Can the blue-footed booby fly?
Blue-footed booby
The blue-footed booby is a specialized fish eater, feeding on small schooling fish such as sardines, anchovies, mackerel, and flying fish. It will also take squid and offal. The blue-footed booby hunts by diving into the ocean after prey, sometimes from a great height, and can also swim underwater in pursuit of its prey. It can hunt singly, in pairs, or in larger flocks. Boobies travel in parties of about 12 to areas of water with large schools of small fish. When the lead bird sees a fish shoal in the water, it will signal to the rest of the group and they will all dive in unison, pointing their bodies down like arrows.
Seabird breeding behavior
Boobies are another group of seabirds known for their mating displays. Brown ("Sula leucogaster"), red-footed ("S. sula") and blue-footed boobies ("S. nebouxii") have at least nine described parts to their mating display. Sky pointing in boobies is similar to albatrosses; in the brown booby, sky pointing is described as a display where the male throws his head backwards, stretches his neck out, and usually gives a whistling vocalization. Parading is a well-known display in boobies as well; in this display, one individual in the pair - usually the male - walks upright, with his tail erect, swaying in an exaggerated manner from side to side while taking small steps. In blue-footed and red-footed boobies, parading also includes lifting and flaunting their brightly colored feet at their prospective partner.
Say's phoebe
The adult Say's phoebe is a drab, chunky bird. It is gray-brown above with a black tail and buffy cinnamon below, becoming more orange around the vent. The tail is long and the primaries end just past the rump on resting birds. The wings seem pale in flight and resemble a female mountain bluebird. The juvenile is similar to adult, but has buffy orange to whitish wingbars and a yellow gape. Adult birds are long. They have a wingspan and they weigh .
Blue mockingbird
The blue mockingbird is uniformly blue on its back, tail, wings, head and underbelly. This color is a result of feather structure rather than pigment, and therefore can look gray in the shade. It has a black "mask" surrounding its reddish-brown eyes. It has a rather long, slightly graduated tail, and dark blue streaks over its breast. Its bill is long, thin and slightly curved, and its legs and feet are black.
Blue-headed parrot
The blue-headed parrot, also known as the blue-headed pionus ("Pionus menstruus") is a medium large parrot. It is about 27 cm long and they are mainly green with a blue head and neck, and red under tail feathers. It is a resident bird in tropical and subtropical South America and southern Central America, from Costa Rica, Venezuela and Trinidad south to Bolivia and Brazil. It is named for its medium-blue head and neck.
Mauritius blue pigeon
"Alectroenas" blue pigeons are closely interrelated and occur widely throughout islands in the western Indian Ocean. They are allopatric and can therefore be regarded as a superspecies. There are three extant species: the Madagascar blue pigeon ("A. madagascariensis"), the Comoros blue pigeon ("A. sganzini"), and the Seychelles blue pigeon ("A. pulcherrima"). The three Mascarene islands were each home to a species, all of which are extinct: the Mauritius blue pigeon, the Rodrigues blue pigeon ("A. payandeei"), and the Réunion blue pigeon ("A." sp.). Compared with other pigeons, the blue pigeons are medium to large, stocky, and have longer wings and tails. All the species have distinct mobile hackles on the head and neck. The tibiotarsus is comparatively long and the tarsometatarsus short. The blue pigeons may have colonised the Mascarenes, the Seychelles or a now submerged hotspot island by "island hopping". They may have evolved into a distinct genus there before reaching Madagascar. Their closest genetic relative is the cloven-feathered dove of New Caledonia ("Drepanoptila holosericea"), from which they separated 8–9 million years ago. Their ancestral group appears to be the fruit doves ("Ptilinopus") of Southeast Asia and Oceania.
Go Fly a Kit
At the airport, a business man notices a red cat seemingly waiting for something or someone. When he asks the steward, he tells the story of a flying cat. As a kitten, he was adopted by a mother eagle. He quickly learned to fly and had to say goodbye to his mother like all eagles. One day, he noticed a bulldog chasing a female cat. He saved her from the dog, using his ability to fly. The cats fall in love with each other. Every winter, the flying cat flies south. At the end, he returns to his girlfriend, along with their flying kittens (two red and two black).Some people confuse Hector, who plays the antagonist, with Marc Anthony. In other cartoons, Marc Anthony is Pussyfoot's acting guardian.
Bunny Bop!
2. Super Buddy (January 31, 2011) - Buddy Bunny tries to fly like a superhero, but he realizes that he really can't fly.
AVIC VSTOL UAVs
Blue Whale (Lan-Jing or Lanjing, 蓝鲸) is a projected Chinese quad tilt-rotor proposed by China Helicopter Research and Development Institute (CHRDI, 中航工业直升机设计研究所) of AVIC. The eventual goal is to have an VTOL aircraft with takeoff weight of 60 tons, and payload of 20 to 30 tons, speed of 538 km/hr, range of 3106 km, ceiling of 8615 m, and combat radius around 815 km. It is designed to be fly-by-light, constructed mostly by composite material, and has distributed avionics. However, when Blue Whale first made its public debut at the 2nd Helicopter China Expo held in Tianjin in September 2013, where Blue Whale was shown in the form of a model, the developer has revealed that the project would be a proof of concept program which is still at its preliminary proposal stage, and since China had never ventured into the tilt rotor arena and the arena of developing large helicopter of this scale (equivalent of Mil Mi-26 class), the project might progress at a much more prudent approach by first developing an unmanned version at much smaller scale than the ultimate manned version, and once all technologies proved to be mature and fully acceptable, the manned version would be developed based on the experienced gained from the unmanned version in the second step. The naming convention of this aircraft appears to support such claim in that instead of assigned a Z designation for helicopter or Y for transport in traditional Chinese aircraft designation system/practice, the aircraft received a name like most Chinese UAVs, and Z and Y designation are not used. Externally, Blue Whale quad tilt-rotor is almost identical to Curtiss-Wright X-19 except it is round five times larger (for the ultimate manned version). Other difference includes the retractable landing gears where Blue Whale the single wheel landing gear of X-19 is replaced by twin-wheel landing gears in Blue Whale, and there are four blades for each rotor of Blue Whale, as opposed to three for that of X-19.
Blue quail
The blue quail is migratory. It often migrates to regions at the start of the rainy season and leaves early in the dry season. It eats seeds, leaves, insects and molluscs. Its voice is a piping whistle, "kew kew yew". It also gives the whistle "tir-tir-tir" when it is flushed. The blue quail is monogamous. The nest is a scrape. Eggs are usually laid at the beginning of the rainy season. There are 3 to 9 olive-brown eggs in a clutch. The eggs have reddish and purplish freckles. They are incubated by the female for around 16 days. The chicks are precocial.
Blue-naped mousebird
Characteristic of mousebirds, the blue-naped mousebird has widely spaced and large feet for its body size, which are pamprodactylous; they are able to rotate all four toes to face forward at will. Their toes are strong and dextrous, allowing the birds to climb and scurry along branches, to hang by a toenail, or to use one foot to hold food.
Blue-footed booby
Males also assess their partner's reproductive value and adjust their own investment in the brood according to their partner's condition. Females that lay larger and brighter eggs are in better condition and have greater reproductive value. Therefore, males tend to display higher attentiveness and parental care to larger eggs, since those eggs were produced by a female with apparent good genetic quality. Smaller, duller eggs garnered less paternal care. Female foot color is also observed as an indication of perceived female condition. In one experiment, the color of eggs was muted by researchers, it was found that males were willing to exercise similar care for both large eggs and small eggs if his mate had brightly colored feet, whereas males paired with dull-footed females only incubated larger eggs. Researchers also found that males did not increase their care when females exhibited both bright feet and high-quality offspring.
Brown booby
This species breeds on islands and coasts in the pantropical areas of the Atlantic and Pacific oceans. They frequent the breeding grounds of the islands in the Gulf of Mexico and the Caribbean Sea. This bird nests in large colonies, laying two chalky blue eggs on the ground in a mound of broken shells and vegetation, but usually raises just one chick, the second one to hatch being unable to compete for food with its older sibling, or even ejected from the nest by it. It winters at sea over a wider area.
Blue-footed booby
Mates can recognize each other by their calls. Researchers have analyzed calls of blue-footed boobies and conducted playback experiments. Although calls differed between sexes, unique individual signatures were present. It was found that both males and females can discriminate the calls of their mates from others.
Blue-breasted blue flycatcher
The blue-breasted blue flycatcher ("Cyornis herioti"), also known as the blue-breasted flycatcher, is a species of bird in the family Muscicapidae. It is endemic to the Philippines. Its natural habitat is subtropical or tropical moist lowland forests.
Blue-headed quail-dove
The blue-headed quail-dove "(Starnoenas cyanocephala)", or blue-headed partridge-dove, is a species of bird in the pigeon and dove family Columbidae. It is monotypic within the subfamily Starnoenadinae and genus Starnoenas.
Large blue
The large blue butterfly is well known among the behavioural ecology field as it exhibits a unique parasitic relationship with a single species of red ant, "Myrmica sabuleti". The species also feeds on thyme and wild marjoram oregano as food plants early in its life cycle.Large blue caterpillars grow to about half an inch (13 millimetres) in length, and spend up to 9 months before they undergo metamorphosis to a chrysalis to become a butterfly. Large blue butterflies have a wingspan of up to 2 inches (50.8 millimetres), and live only for a few weeks. The wings of the large blue butterfly are speckled with black dots.
Red-footed booby
The first formal description of the red-footed booby was by the Swedish naturalist Carl Linnaeus in 1766 in the twelfth edition of his "Systema Naturae". He introduced the binomial name "Pelecanus sula". The type locality is Barbados in the West Indies. The present genus "Sula" was introduced by the French scientist Mathurin Jacques Brisson in 1760. The word "Sula" is Norwegian for a gannet.
Blue-and-yellow macaw
These birds can reach a length of and weigh , making them some of the larger members of their family. They are vivid in appearance with blue feathers on the top of their wings, torso, and tail—and halfway on top of their head; the other half of the top of their head is covered with gradient hues of green feathers, starting out lime in the front and gradually becoming chartreuse further down. On the bottom of these mentioned areas of their body are light orange feathers. Their beak is black, as well as the feathers under their chin. The face feathers are white, turning pink in excited birds, and lined with small, black striped patterns of feathers around the eyes. The irises are light yellow. Blue-and-yellow macaws live from 30 to 35 years in the wild and reach sexual maturity between the ages of 3 and 6 years.
Bumblebee
The calculations that purported to show that bumblebees cannot fly are based upon a simplified linear treatment of oscillating aerofoils. The method assumes small amplitude oscillations without flow separation. This ignores the effect of dynamic stall (an airflow separation inducing a large vortex above the wing), which briefly produces several times the lift of the aerofoil in regular flight. More sophisticated aerodynamic analysis shows the bumblebee can fly because its wings encounter dynamic stall in every oscillation cycle.
The Sponge Who Could Fly
The series follows the adventures and endeavors of the title character in the underwater city of Bikini Bottom. In this episode, SpongeBob wishes he could fly with the jellyfish. He makes several attempts to do so, but all of these fail. At home, SpongeBob is drying his hair and receives a phone call, he puts the hair dryer in his square pants, and the dryer inflates them, giving him the ability to fly. He goes around helping people, earning their admiration and becoming a superhero of sorts. However, other characters continue to ask increasingly unnecessary favors of him, leaving him no time to fly with the jellyfish.
Adolphe-Simon Neboux
Among species he described are the swallow-tailed gull and the white-capped fruit-dove. In the Galapagos, he collected specimens of the Galápagos dove, Galápagos martin, medium ground finch and the common cactus finch — these specimens were later presented to the "Museum d'Histoire Naturelle" in 1839. He is honoured in the scientific name of the blue-footed booby ("Sula nebouxii").
Blue-footed booby
Females start breeding when they are 1 to 6 years old, while males start breeding when they are 2 to 6 years old. There is very limited natal dispersal, meaning that young pairs do not move far from their original natal nests for their own first reproduction, leading to the congregation of hundreds of boobies in dense colonies. The benefit of limited dispersal is that by staying close to their parents' nesting sites, the boobies are more likely to have a high-quality nest. Since their parents had successfully raised chicks to reproductive age, their nest site must have been effective, either by providing cover from predation and parasitism, or by its suitability for taking off and landing. Bigamy has been observed in the species, and there are known cases where two females and one male all share a single nest.
Australasian gannet
This species is distinctive, and only likely to be confused with species that do not generally share its range. The Cape gannet is a rare vagrant to Australasian waters and has an all-black tail, while the masked and red-footed boobies are generally restricted to tropical waters. Although both have mostly white plumage, they lack the buff colouring of the head and have white tails. The masked booby has a blue-black face and less black on the wing, while the red-footed booby has red feet.
Scooby-Doo! Mask of the Blue Falcon
Scooby-Doo! Mask of the Blue Falcon is a 2013 direct-to-DVD animated superhero action comedy film, and the nineteenth entry in the direct-to-video series of "Scooby-Doo" films. The film is a crossover, featuring Blue Falcon and Dynomutt. It was produced and completed in 2012, and released on February 26, 2013 by Warner Premiere.
Blue-winged macaw
It has a total length of approximately 36–43 cm (14–17 in). It has a moderately-sized black bill, a long tail and a mainly green plumage. The upperside of the remiges and primary coverts are blue, as indicated by its common name. The underside of the wings is yellowish, the tail-tip, crown and cheeks are bluish, and the tail-base and small belly-patch are red. The iris is amber. It and the red-bellied macaw are the only macaws where the bare facial-skin is yellowish, but this often fades to white in captivity. Unlike the red-bellied macaw, the blue-winged has a red lower abdomen and a red lower back. In the wild, its flight pattern is said to be a distinctive 'jerky, rearing motion.'
Dominance hierarchy
The blue-footed booby brood of two chicks always has a dominance hierarchy due to the asynchronous hatching of the eggs. One egg is laid four days before the other, and incubation starts immediately after laying, so the elder chick is hatched four days before the younger chick and has a four-day head start on growth. The elder, stronger chick almost always becomes the dominant chick. During times of food shortage, the dominant chick often kills the subordinate chick by either repeatedly pecking or by ousting the younger chick from the nest. The brood hierarchy makes it easier for the subordinate chick to die quietly in times of food scarcity, which provides an efficient system for booby parents to maximize their investment.
Blue-winged warbler
The blue-winged warbler ("Vermivora cyanoptera") is a fairly common New World warbler, long and weighing . It breeds in eastern North America in southern Ontario and the eastern United States. Its range is extending northwards, where it is replacing the very closely related golden-winged warbler, "Vermivora chrysoptera".
Mountain bluebird
The mountain bluebird ("Sialia currucoides") is a medium-sized bird weighing about with a length from . They have light underbellies and black eyes. Adult males have thin bills and are bright turquoise-blue and somewhat lighter underneath. Adult females have duller blue wings and tail, grey breast, grey crown, throat and back. In fresh fall plumage, the female's throat and breast are tinged with red-orange, brownish near the flank contrasting with white tail underparts. Their call is a thin 'few'; while their song is warbled high 'chur chur'. It is the state bird of Idaho and Nevada. It is an omnivore and it can live 6 to 10 years in the wild. It eats spiders, grasshoppers, flies and other insects, and small fruits. The mountain bluebird is a relative of the eastern and western bluebirds.
Bombyx mori
The moth – the adult phase of the lifecycle – is not capable of functional flight, in contrast to the wild "B. mandarina" and other "Bombyx" species, whose males fly to meet females and for evasion from predators. Some may emerge with the ability to lift off and stay airborne, but sustained flight cannot be achieved. This is because their bodies are too big and heavy for their small wings. However, some silkmoths can still fly. Silkmoths have a wingspan of and a white, hairy body. Females are about two to three times bulkier than males (for they are carrying many eggs), but are similarly colored. Adult Bombycidae have reduced mouth parts and do not feed, though a human caretaker can feed them.
Rufous-legged owl
The rufous-legged owl ("Strix rufipes") is a medium-sized owl with no ear tufts. Its upper parts are rufous brown barred with white with more white on the head and nape. It has a rufous facial disk and dark eyes, and its legs and feet are orange-brown to cinnamon. It grows to a size about 33–38 cm long and weighs about 300-400 grams. Its range stretches from central Chile and west Argentina to Tierra del Fuego and is occasionally spotted on the Falkland Islands. It lives in dense, moist montane forest and semi-open lowland forest where it can catch small mammals, birds, and insects. It breeds in October and lays 2-3 eggs in a tree hole. Its call is a rapid grunting followed by high pitched nasal noises. Though it is not threatened it does suffer habitat loss because of logging in a large part of its range.
Blue-throated sapphire
The blue-throated sapphire was first described by Bourcier and Mulsant in 1846. Two subspecies are now recognized:The Blue-throated sapphire is endemic to the Americas. Its range extends from southern Mexico to western Panama along both slopes, with a few occurrences in northern Chocó in Colombia. The Blue-throated sapphire occupies lowlands and valleys, and its elevational range varies between 950 m. a.s.l. in Costa Rica and 1000 m. a.s.l. in Mexico. Yet, some specimens have been recorded up to 2000 m a.s.l in the Braulio National Park in Costa Rica, as well as in El Salvador. Though its seasonal movements are poorly documented, the blue-throated sapphire is considered resident throughout most of its range and is relatively sedentary but it may display local wandering during flowering. Some studies suggest that these unusual records at high elevations could be an effect of climate change, as bird species occupying high elevations have been shown to be declining in abundance, while other bird species occurring in lower elevations have started to move upwards.
Peruvian booby
The Peruvian booby has brown upperparts, and white underparts, as well as a white head. There is noticeable white mottling on the upper side of the wings. Their wing-coverts are tipped white, creating a scale-like pattern. They have a long, pointed, grey bill. Their feet are webbed and also grey; as opposed to the characteristic colouring of the blue-footed and red-footed boobies
Female boobies tend to be larger than their male counterparts: their bodies an average of 19% heavier, and their wings 4% larger.
Blue coua
The bird's feathers are a deep blue and there is a distinctive blue oval area around the eye which is free of feathers. Like all cuckoos they have large feet, with a reversible third toe. It has a bulky silhouette and short, broad wings and long tail, all of which can be seen when gliding between trees. The average size of the birds is in length and in weight with the females slightly larger. The calls are evenly spaced ″"koa koa koa"″ notes and a brief ″"brreee"″.
Red-footed booby
In January 2017, a red-footed booby was sighted on the New Zealand mainland for the first time.
Masked booby
Compared to other species of boobies such as the blue-footed booby, siblicide is obligatory in the masked booby. One reason is because the masked boobies build very shallow flat nests, so older chicks can expel their younger siblings with relative ease. Blue-footed booby parents, meanwhile, build nests with steeper sides, thus preventing some older chicks from engaging in siblicidal behaviour.
Blue-footed booby
A booby may use and defend two or three nesting sites, which consist of bare black lava in small divots in the ground, until they develop a preference for one a few weeks before the eggs are laid. These nests are created as parts of large colonies. While nesting, the female will turn to face the sun throughout the day, so the nest is surrounded by excrement.
Blue-winged parrot
The blue-winged parrot is found across southeastern Australia. In eastern South Australia, it is found north to the Flinders Ranges, and across Victoria. It is more sporadic across central and western New South Wales and into Queensland, as far north as Diamantina National Park. It lives in savannah woodland, grasslands, orchards, farmlands, marshes, heath, dunes, and other open habitats up to above sea level. It is one of only three species of parrot that make regular yearly migrations over a sea or ocean, with many members of the species flying between Tasmania, where they breed in spring and summer, and the mainland, where they winter. Some birds, however, do remain in Tasmania over the winter and some remain on the mainland to breed in the summer.
Blue-winged kookaburra
The blue-winged kookaburra has a distribution from southern New Guinea and the moister parts of northern Australia, to the vicinity of Brisbane in southern Queensland across the Top End, and as far down the Western Australian coast as the Shark Bay area. However, it does not occur between Broome and Port Hedland in northwestern Australia. Widespread and common throughout its large range, the blue-winged kookaburra is evaluated as Least Concern on the IUCN Red List of Threatened Species. 
Found in family groups of up to 12 individuals, it lives in open savannah woodland and "Melaleuca" swamps, as well as farmlands such as sugar cane plantations.
Blue-headed bee-eater
The blue-headed bee-eater ("Merops muelleri") is a species of bird in the family Meropidae. It is found in forest habitats in tropical West and Central Africa, including in Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Gabon, Equatorial Guinea, and Kenya.
Blue duck
Blue ducks nest between August and October, laying 4-9 creamy white eggs. The female incubates the eggs for 35 days and chicks can fly when about 70 days old.
Blue-footed booby
Concerns of a decline in the booby population of the Galápagos Islands prompted a research project in its cause. The project, completed in April 2014, confirmed the population decline. The blue-footed booby population appears to be having trouble breeding and thus is slowly declining. The decline is feared to be long-term, but annual data collection is needed for a firm conclusion that this is not a normal fluctuation.
Blue-bellied parrot
It is a relatively long-tailed parrot with a total length of c. 28 cm. (11 in). It is green overall and the beak is whitish. Only the male has the bluish-purple patch on the belly for which this species is named. It has a whistled call and pairs will sing in duet, but it is typically fairly quiet and therefore easily overlooked.
Blue-footed booby
There is always a dominant-subordinate relationship between chicks in a brood. Although dominant A-chicks grow faster and survive past infancy more often than the subordinate B-chick, there is actually no difference in reproductive success between the two types of siblings during adulthood. In one longitudinal study, there appears to be no long-term effects of dominance hierarchies; in fact, subordinate chicks were often observed producing nests of their own before their dominant siblings.
Blue-faced honeyeater
Like those of all passerines, the chicks are altricial; they are born blind and covered only by sparse tufts of brown down on their backs, shoulders and parts of wings. By four days they open their eyes, and pin feathers emerge from their wings on day six, and the rest of the body on days seven and eight. Both parents feed the young, and are sometimes assisted by helper birds. The Pacific koel and pallid cuckoo ("Cuculus pallidus") have been recorded as brood parasites of the blue-faced honeyeater, and the laughing kookaburra recorded as preying on broods.
Blue-footed booby
Blue-footed booby parents are passive spectators of this intrabrood conflict. They do not intervene in their offspring's struggles, even at the point of siblicide. Booby parents even appear to facilitate the demise of the younger sibling by creating and maintaining the inequality between the two chicks. They reinforce the brood hierarchy by feeding the dominant chick more often than the subordinate one. Thus, they respond to the brood hierarchy and not to the level of begging when deciding which chick to feed, as both chicks beg in equal amounts. This level of passivity towards the very possible death of their younger offspring may be an indication that brood reduction is advantageous for the parents. The "Insurance Egg Hypothesis" views the second egg and resulting chick as insurance for the parent in case the first egg does not hatch, or if food levels are higher than expected.
Blue-footed booby
Plunge diving can be done from heights of and even up to . These birds hit the water around and can go to depths of below the water surface. Their skulls contain special air sacs that protect the brain from enormous pressure. Prey are usually eaten while the birds are still underwater. Individuals prefer to eat on their own instead of with their hunting group, usually in the early morning or late afternoon. Males and females fish differently, which may contribute to why blue-foots, unlike other boobies, raise more than one young. The male is smaller and has a proportionally larger tail, which enables the male to fish in shallow areas as well as deep waters. The female is larger and can carry more food. Both the male and female feed the chicks through regurgitation.
Red-footed booby
The red-footed booby ("Sula sula") is a large seabird of the booby family, Sulidae. As suggested by the name, adults always have red feet, but the colour of the plumage varies. They are powerful and agile fliers, but they are clumsy in takeoffs and landings. They are found widely in the tropics, and breed colonially in coastal regions, especially islands.
Vipo: Adventures of the Flying Dog
The stories revolve around a flying dog named VIPO. 
Having unusually long ears, VIPO learns to fly and joins his friends Henry (the stork) and Betty (the toy cat) on a trip around the world.Billy (the bull), Dr. Timmly (the guinea pig), Igo (the tiger), Nessy (the Loch Ness monster), Vincent Van Fox (the Fox), Yao (the Chinese monkey), Yoshi (the mouse) Amadeus (The mouse), Amadeus's mice (the mice), Keanu (the rabbit), The Employee Rabbits (the rabbits), Jose (the donkey), Aurora (the cow), Blacky (the sheep), Alexander (the sheep), Dimitris (the goat) and others.
Blue pigeon
The "Alectroenas" blue pigeons are closely interrelated and occur widely throughout islands in the western Indian Ocean. They are allopatric and can therefore be regarded as a superspecies. There are three extant species; the Madagascan blue pigeon, the Comoros blue pigeon, and the Seychelles blue pigeon. The three Mascarene islands were home to a species each, which are all extinct; the Mauritius blue pigeon, the Rodrigues blue pigeon, and the Réunion blue pigeon. Compared to other pigeons, the blue pigeons are medium to large, stocky, have comparatively long wings and tails. They all have distinct mobile hackles on the head and neck. The tibiotarsus is comparatively long and the tarsometatarsus short.
Sicyopterus lagocephalus
Sicyopterus lagocephalus, the red-tailed goby or blue stream goby, is a species of goby native to islands of the Indian Ocean from the Comoros to the Mascarene Islands to the Pacific Ocean where it reaches French Polynesia and can be found as far north as Japan. It is an amphidromous species: adults can be found in swift-flowing streams with rocky beds but the eggs hatch at sea and the larval stage remains in marine waters, migrating to freshwaters when they reach the postlarval stage. This species can reach a total length of . In some places it is an important species for local consumption with the post-larvae being caught as they mass in estuaries.
Blue-eyed cockatoo
The blue-eyed cockatoo is a large, approximately long, mainly white cockatoo with an erectile yellow and white crest, a black beak, dark grey legs, and a light blue rim of featherless skin around each eye, that gives this species its name. The sexes are very similar in appearance. Some males have a dark brown iris and some females have a reddish-brown iris, but this small difference is not always reliable as a gender indicator. The blue-eyed cockatoo is easily mistaken for the yellow-crested and sulphur-crested cockatoos, but has a more rounded crest with more white to the frontal part, and a brighter blue eye-ring. The Blue-eyed cockatoo reaches full maturity after 4 years and lives an average of 50 years.
Bird Kingdom
Blue-headed Pionus
Blue-bearded bee-eater
The blue-bearded bee-eater ("Nyctyornis athertoni") is a species of bee-eater found in much of the Indian subcontinent and parts of Southeast Asia. This bee-eater is found in forest clearings. It is found mainly in the Malayan region but extends west into peninsular India. The blue feathers of its throat are elongated and often fluffed giving it its name. They have a loud call but are not as gregarious or active as the smaller bee-eaters, and their square ended tail lacks the typical "wires" made up of the shafts of the longer central tail feathers in many species.
Blue quail
The blue quail is long and weighs . Its legs are yellow. The colour of the eyes varies from brown in the juvenile to red in the breeding male. The species is sexually dimorphic. The male's plumage is mostly dark slaty-blue, with rufous patches on its wings. The male has a black beak, a brown head, and a black and white throat. There is a white patch on its breast. Its flight feathers are brown. The forehead, sides of the head and neck, and flanks of the female are orange-buff. Its crown is brown, with black mottles. The female's beak is brownish. Its underparts are buff, with black bars, and its upperparts have black and rufous mottles and streaks. The juvenile is similar to the female.
Blue jay
The blue jay can be beneficial to other bird species, as it may chase predatory birds, such as hawks and owls, and will scream if it sees a predator within its territory. It has also been known to sound an alarm call when hawks or other dangers are near, and smaller birds often recognize this call and hide themselves away accordingly. It may occasionally impersonate the calls of raptors, especially those of the red-tailed and red-shouldered hawks, possibly to test if a hawk is in the vicinity, though also possibly to scare off other birds that may compete for food sources. It may also be aggressive towards humans who come close to its nest, and if an owl roosts near the nest during the daytime the blue jay mobs it until it takes a new roost. However, blue jays have also been known to attack or kill other smaller birds and sleeping, foliage-roosting bat species such as "Lasiurus borealis". Jays are very territorial birds, and they will chase others from a feeder for an easier meal. Additionally, the blue jay may raid other birds' nests, stealing eggs, chicks, and nests. However, this may not be as common as is typically thought, as only 1% of food matter in one study was bird material. Despite this, other passerines may still mob jays who come within their breeding territories.
Blue jays, like other corvids, are highly curious and are considered intelligent birds. Young individuals playfully snatch brightly coloured or reflective objects, such as bottle caps or pieces of aluminum foil, and carry them around until they lose interest. While not confirmed to have engaged in tool use in the wild, blue jays in captivity have been observed using strips of newspaper as tools to obtain food, while captive fledglings have been observed attempting to open the doors of their cages.
Blue-backed manakin
The blue-backed manakin ("Chiroxiphia pareola") is a small passerine bird which breeds in tropical South America, its range extending from Colombia and Tobago to southeastern Brazil. It is found in deciduous forests but not evergreen rainforests. It is a small, plump bird about long. Males have black plumage with a bright blue back and a red or yellow crown. Females and juveniles are olive-green with paler underparts. At breeding time, males are involved in a cooperative lekking behaviour during which they jump and twirl. This is a fairly common species with a wide range, and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
Blue-headed parrot
The blue-headed parrot is about long and weighs 245 g. It is mainly green with a blue head, neck and upper breast, red undertail coverts, and some yellowish on the wing coverts. The upper mandible is black with reddish areas on both sides. They have dark ear patches. In addition to the well-known nominate subspecies found throughout most of the species' South American range, there are two more localized subspecies: "rubrigularis" from southern Central America and the Chocó has an overall paler plumage and typically a relatively distinct pinkish patch on the throat, and "reichenowi" from the Atlantic Forest in east Brazil has a paler bill and most of the underparts blue. In all subspecies the male and the female are alike, and juvenile birds have less blue on the head, as well as red or pinkish feathers around the ceres. They moult into their adult plumage at about 8 months of age, but it can take up to two years for the full blue hood to emerge.
Blue-winged goose
The blue-winged goose ("Cyanochen cyanoptera") is a waterfowl species which is endemic to Ethiopia. It is the only member of the genus Cyanochen.
Blue-winged kookaburra
Measuring around , it is slightly smaller than the more familiar laughing kookaburra. It has cream-coloured upper- and underparts barred with brownish markings. It has blue wings and brown shoulders and blue rump. It is sexually dimorphic, with a blue tail in the male, and a rufous tail with blackish bars in the female.
Blue jay
The blue jay ("Cyanocitta cristata") is a passerine bird in the family Corvidae, native to North America. It resides through most of eastern and central United States, although western populations may be migratory. Resident populations are also found in Newfoundland, Canada, while breeding populations can be found in southern Canada. It breeds in both deciduous and coniferous forests, and is common in residential areas. It is predominantly blue with a white chest and underparts, and a blue crest. It has a black, U-shaped collar around its neck and a black border behind the crest. Both sexes are similar in size and plumage, and plumage does not vary throughout the year. Four subspecies of the blue jay have been recognized.
Blue bottle fly
"Calliphora vomitoria" is long, slightly larger than a housefly. The head and thorax are dull gray, the back of head has long yellow-orange setae and the abdomen is bright metallic blue with black markings. Its body and legs are covered with black bristle-like hair. It has short, clubbed antennae and 4 tarsi per leg. The eyes are red and the wings are transparent. The legs and antennae are black and pink. The chest is bright purple and has spikes to protect itself from other flies.
Blue-throated roller
The blue-throated roller is a dumpy, large-headed, thick-necked bird that frequents the tops of trees. Overall, it is a dark bird, mainly chestnut brown with a bright yellow bill and a blue patch on the throat, a blue tail and purplish blue wings. The juvenile shows bluish on the underparts. It is a rather long-winged roller and can give a falcon like silhouette in flight. It measures 25 cm in length; the males weigh 82–117.5 g, the females 88–108g.
Blue-footed booby
Since the blue-footed booby preys on fish by diving headlong into the water, its nostrils are permanently closed, and it has to breathe through the corners of its mouth. Its most notable characteristic is its blue-colored feet, which can range in color from a pale turquoise to a deep aquamarine. Males and younger birds have lighter feet than females. Its blue feet play a key role in courtship rituals and breeding, with the male visually displaying its feet to attract mates during the breeding season.
Blue-footed booby
However, booby parents may not be as indifferent as they seem. Experimental evidence suggests that the parental behavior described above may be masking parent-offspring conflict. It was discovered that blue-footed booby parents make steep-sided nests that serve to deter the early ejection of the younger chick by the older sibling. This is in direct contrast to the masked booby, a species in which siblicide is obligate due to the ease in which older siblings can eject younger chicks from their flat nests. When blue-footed booby nests were experimentally flattened, parents restored them to their original steepness. In another experiment, blue-footed booby chicks that were placed in masked booby nests were more likely to engage in siblicide, which reveals that parental care somehow affects the level of siblicide. Parents also appear to respond more frequently to chicks that are in poorer body conditions during periods of food deprivation. Egg-mass analysis shows that in clutches produced at the beginning of the breeding season, the second egg in a nest were, on average, 1.5% heavier than the first. Since heavier eggs give rise to heavier chicks that have greater fitness, this evidence indicates that parents may try to rectify any disadvantages that accompany a late hatching date by investing more into the second egg. Hormonal analysis of eggs also shows that there appears to be no parental favoritism in regards to androgen allocation. It is important to note, however, that this may simply be that the species has evolved simpler ways to manipulate asymmetries and maximize parental reproductive output. Experiments show that what may at first appear to be parental cooperation with the elder chick may in fact mask a genetic parent-offspring conflict.
Behavioral ecology
In some bird species, sibling rivalry is also abetted by the asynchronous hatching of eggs. In the blue-footed booby, for example, the first egg in a nest is hatched four days before the second one, resulting in the elder chick having a four-day head start in growth. When the elder chick falls 20-25% below its expected weight threshold, it attacks its younger sibling and drives it from the nest.
Blue-faced malkoha
The blue-faced malkoha or small green-billed malkoha ("Phaenicophaeus viridirostris") is a non-parasitic cuckoo found in the scrub and deciduous forests of peninsular India and Sri Lanka. It has a waxy, dark, blue-grey plumage on its upperparts and has a long tail with graduated white-tipped feathers. The throat and chin are dark with spiny pale feathers that are branched. The lower belly is a dull creamy to rufous colour. The bill is apple green, and a naked patch of blue skin surrounds the eye. The sexes are alike. The blue-faced malkoha is a bird of open forests and scrub jungle.
Blue-faced honeyeater
Three subspecies are recognised:A large honeyeater ranging from and averaging in length, the adult blue-faced honeyeater has a wingspan of and weighs around . In general shape, it has broad wings with rounded tips and a medium squarish tail. The sturdy slightly downcurved bill is shorter than the skull, and measures in length. It is easily recognised by the bare blue skin around its eyes. The head and throat are otherwise predominantly blackish with a white stripe around the nape and another from the cheek. The upperparts, including mantle, back and wings, are a golden-olive colour, and the margins of the primary and secondary coverts a darker olive-brown, while the underparts are white. Juveniles that have just fledged have grey head, chin and central parts of their breasts, and brown upperparts, and otherwise white underparts. After their next moult, they more closely resemble adults and have similar plumage, but are distinguished by their facial patches. The bare facial skin of birds just fledged is yellow, sometimes with a small patch of blue in front of the eyes, while the skin of birds six months and older has usually become more greenish, and turn darker blue beneath the eye, before assuming the adult blue facial patch by around 16 months of age. The blue-faced honeyeater begins its moult in October or November, starting with its primary flight feathers, replacing them by February. It replaces its body feathers anywhere from December to June, and tail feathers between December and July. 422 blue-faced honeyeaters have been banded between 1953 and 1997 to monitor movements and longevity. Of these, 109 were eventually recovered, 107 of which were within of their point of banding. The record for longevity was a bird banded in May 1990 in Kingaroy in central Queensland which was found dead on a road after 8 years and 3.5 months in September 1998, around away.
Blue bottle fly
This bluebottle fly can cause human or animal myiasis. Forensic scientists sometimes identify it in the course of their works, particularly in the case of an autopsy of a neglected child.
Blue-footed booby
The blue color of the blue-footed booby's webbed feet comes from carotenoid pigments obtained from its diet of fresh fish. Carotenoids act as antioxidants and stimulants for the blue-footed booby's immune function, suggesting that carotenoid-pigmentation is an indicator of an individual's immunological state. Blue feet also indicate the current health condition of a booby. Boobies that were experimentally food-deprived for forty-eight hours experienced a decrease in foot brightness due to a reduction in the amount of lipids and lipoproteins that are used to absorb and transport carotenoids. Thus, the feet are rapid and honest indicators of a booby's current level of nourishment. As blue feet are signals that reliably indicate the immunological and health condition of a booby, coloration is favored through sexual selection.
Winner and loser effects
Blue-Footed Boobies show a frequency dependent dominant-submissive behavioural strategy. In these birds, the nestlings develop one of the following strategies, either dominant or submissive. If first born chicks showed aggression early on towards its siblings then it likely became a dominant member, while if the chick was non-aggressive early on, then it likely adopted the submissive strategy. Winner and loser effects are seen in this species due to the behavioural strategy.
Blue-eyed ground dove
The blue-eyed ground dove ("Columbina cyanopis") is a species of bird in the family Columbidae. It is endemic to the Cerrado region of Brazil. Its natural habitat is subtropical or tropical dry lowland grassland. It is threatened by habitat loss.
Blue-throated macaw
Blue-throated macaws are most frequently found in monogamous pairs, but small groups of 7–9 do occur and one large roosting group of 70 is known. It is not known if these macaws will pair with another mate if their original mate dies. Their main mode of locomotion is flying, but they are also able to climb trees, maneuver along branches and walk on the ground. These birds are active during the day and usually stay in one general area. Blue-throated macaws communicate mostly by sound. When they suspect danger, they emit a very loud alarming call and promptly fly off. Blue-throated macaws are known to communicate with each other with quiet caws as well.
Blue jay
Four subspecies are generally accepted, though the variation within this species is rather subtle and essentially clinal. No firm boundaries can be drawn between the inland subspecies. The ranges of the coastal races are better delimited.The blue jay is a noisy, bold, and aggressive passerine. It is a moderately slow flier (roughly ) when unprovoked. It flies with body and tail held level, with slow wing beats.
Due to its slow flying speeds, this species makes easy prey for hawks and owls when flying in open areas. Virtually all the raptorial birds sympatric in distribution with the blue jay may prey upon it, especially swift bird-hunting specialists such as the "Accipiter" hawks. Diverse predators may prey on jay eggs and young up to their fledging stage, including tree squirrels, snakes, cats, crows, raccoons, opossums, other jays and possibly many of the same birds of prey who attack adults.
Abbott's booby
Individuals are solitary long-distance travellers, who can range thousands of kilometres from Christmas Island. They are very vocal, with a wide range of calls. Due to their size, they require a large clear space to take off. herefore they nest near the tops of trees. If an individual falls to the forest floor, it will starve unless it can climb high enough to be able to catch the wind and take off. Adults rarely fight owing to the risk of falling. Fledglings must succeed in their first attempt at flight; unsuccessful attempts rarely result in the fledgling's survival.
Blue-winged goose
This is a stocky grey-brown bird about long with a slightly paler head and upper neck. It has a small black bill and black legs. In flight, this species shows a pale blue forewing. Sexes are similar, but immature birds are duller. The plumage of these birds is thick and loose, furlike as an adaptation to the cold of the Ethiopian highlands.
Blue-footed booby
Food problems may be the cause of an observed failure of the birds to even try to breed. The results of the research suggest this is related to a decline in sardines ("Sardinops sagax"), an important part of the boobies’ diet. Earlier work on Española Island saw successful breeding in blue-footed boobies that have access to sardines, in which case their diet consists essentially wholly of sardines. However, sardines have been largely absent from the Española area since 1997, as has been shown from Nazca boobies there, who also prefer sardines but can breed using other prey. In 2012–13, roughly only half of prey items in the boobies' diet were sardines. No evidence was seen of other possible causes for the decline, such as effects of humans, introduced predators, or disease.
Blue-headed macaw
The blue-headed macaw is 41 cm (16 in) long. It has mainly green plumage (often tinged olive, esp. below) with the head, flight feathers and primary coverts blue. The uppertail has a maroon base, a narrow green center and a blue tip. The undertail and underwing are greenish-yellow similar to that of several other small macaws (e.g. red-bellied and golden-collared macaw). The medium-sized bill is pale greyish-horn with a black base (extent varies, but upper mandible in adults typically appears mainly pale). The iris is whitish with a narrow, often barely visible, maroon eye-ring. Unlike most other macaws, the facial skin and lores are dark greyish. The legs are dull pinkish. Juveniles resemble adults, but with the entire bill black, greyer legs, darker iris and the facial skin and lores white.
Abbott's booby
Abbott's booby is the largest of all booby species, and is adapted to long-distance flight. Individuals can reach from beak to tail, and weigh about . It is distinguished from other sulids in the region due to its black and white plumage. They have an off-white plumage, which contrasts with black eye patches, black wings and tails, and black flank marks. Their feet are blue and webbed, with black outer ends. Males have pale grey bills with a black tip, whereas females have pink bills with a black tip. Chicks have white down and a cape of black scapular feathers.
Brown booby
The brown booby ("Sula leucogaster") is a large seabird of the booby family, Sulidae, of which it is perhaps the most common and widespread species. It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters. Flocks plunge-dive to take small fish, especially when these are driven near the surface by their predators. They only nest on the ground, and roost on solid objects rather than the water surface.
Blue-winged parrot
The blue-winged parrot ("Neophema chrysostoma"), also known as the blue-banded parakeet or blue-banded grass-parakeet, is a small parrot found in Tasmania and southeast mainland Australia. It is partly migratory, with populations of blue-winged parrots travelling to Tasmania for the summer. The parrot is sexually dimorphic – the males have more blue on the wings and a two-toned blue frontal band on the head, while females are duller and have more green on the wings and a wingbar. Both sexes have predominantly olive-green plumage. Predominantly a feeder on the ground, the blue-winged parrot mainly eats seeds of grasses. It adapts readily to captivity.
Red-footed booby
Red-footed booby pairs may remain together over several seasons. They perform elaborate greeting rituals, including harsh squawks and the male's display of his blue throat, also including short dances.
Thyreophora cynophila
Thyreophora cynophila, commonly known as the bone skipper is a species of fly, once thought to be the first fly to be driven to extinction by humans, but rediscovered in 2009. It has a bright orange head, and is associated with animal carcasses where the bones are broken open.
"Thyreophora cynophila" was originally described by Georg Wolfgang Franz Panzer in 1798, under the name "Musca cynophila". He described it in German as "" ("dog-fly"), having found it on the carcass of a dog in Mannheim. The animal is nearly long, and the head is bright orange in colour, while the body and legs are metallic blue; the wings bear a pair of black spots. In 1803, Johann Wilhelm Meigen transferred the species to a new genus, "Thyreophora", which means "shield-bearer", in reference to the enlarged scutellum in the male. (The name Thyreophora is also used for a dinosaur suborder.) Later reports extended the species' geographical range to include France and Austria, and some reported that the fly had a luminous head.
Blue-footed booby
The female blue-footed booby lays two or three eggs. Eggs are laid about four to five days apart. Both male and female take turns incubating the eggs, while the non-sitting bird keeps watch. Since the blue-footed booby does not have a brooding patch, it uses its feet to keep the eggs warm. The incubation period is 41–45 days. Usually, one to two chicks are hatched from the two to three eggs originally laid. The male and female share parental responsibilities. The male will provide food for the young in the first part of their life because of his specialized diving. The female will take over when the demand is higher. Chicks feed off the regurgitated fish in the adult's mouth. If the parent blue-footed booby does not have enough food for all of the chicks, it will only feed the biggest chick, ensuring that at least one will survive.
Like other sexually size-dimorphic birds, female blue-footed boobies usually favor the smaller sex during times of food scarcity. Booby chicks do not show clear differences in size based on sex, but females do grow faster than males, which means they require greater parental investment. Blue-footed boobies display behavior that is described in the Flexible Investment Hypothesis, which states that a female will adjust the allocation of resources to maximize her lifetime reproductive success. This was shown in an experiment in which females had their flight feathers trimmed, so that they had to expend more energy during flights to obtain food for their broods. Female chicks of such mothers were more strongly affected than their brothers, in that they had lower masses and shorter wing lengths.
Blue-winged parakeet
The blue-winged parakeet, also known as the Malabar parakeet ("Psittacula columboides") is a species of parakeet endemic to the Western Ghats of southern India. Found in small flocks, they fly rapidly in forest clearings while making screeching calls that differ from those of other parakeet species within their distribution range. Their long blue tails tipped in yellow and the dark wings with blue contrast with the dull grey of their head and body. Adult males and females can be easily told apart from the colour of their beak.
Blue-throated blue flycatcher
The blue-throated blue flycatcher ("Cyornis rubeculoides") is a small passerine bird in the flycatcher family, Muscicapidae. It resembles "Cyornis tickelliae" but easily separated by the blue throat. The habitat of this species is a thicker forest than other species of flycatchers. The blue-throated flycatcher is found in much of the Indian Subcontinent, all through the Himalayas, the plains and Western Ghats of India in the cold months, and also extends eastwards into Bangladesh, and to Arakan and the Tenasserim Hills in Myanmar.
Blue-faced honeyeater
The blue-faced honeyeater was first described by ornithologist John Latham in his 1801 work "Supplementum Indicis Ornithologici, sive Systematis Ornithologiae". However, he described it as three separate species, seemingly not knowing it was the same bird in each case: The blue-eared grackle ("Gracula cyanotis"), the blue-cheeked bee-eater ("Merops cyanops"), and as the blue-cheeked thrush ("Turdus cyanous"). It was as the blue-cheeked bee-eater that it was painted between 1788 and 1797 by Thomas Watling, one of a group known collectively as the Port Jackson Painter. It was reclassified in the genus "Entomyzon", which was erected by William Swainson in 1825, who observed the "Blue-faced Grakle" as the only insectivorous member of the genus and posited it was a link between the smaller honeyeaters and the riflebirds of the genus "Ptiloris". The generic name is derived from the Ancient Greek "ento-/εντο"- ("inside") and "myzein/μυζειν" "to drink" or "suck". The specific epithet, "cyanotis", means "blue-eared" and combines "cyano-/κυανο"- "blue" with "otis", a Latinised form of "ωτος", the Greek genitive of "ous/ους" "ear". Swainson spelt it "Entomiza" in an 1837 publication, and George Gray wrote "Entomyza" in 1840.
Blue-moustached bee-eater
The blue-moustached bee-eater is a rainforest bird usually found singly. It perches on a high branch in the canopy beside tracks and clearings and swoops down on small butterflies, honeybees and other insects before returning to its original perch.
Brown booby
Brown booby pairs may remain together over several seasons. They perform elaborate greeting rituals, and are also spectacular divers, plunging into the ocean at high speed. They mainly eat small fish or squid which gather in groups near the surface and may catch leaping fish while skimming the surface. Although they are powerful and agile fliers, they are particularly clumsy in takeoffs and landings; they use strong winds and high perches to assist their takeoffs.
Blue-faced honeyeater
The blue-faced honeyeater probably breeds throughout its range. The breeding season is from June to January, with one or two broods raised during this time. The nest is an untidy deep bowl of sticks and bits of bark in the fork of a tree, Staghorn or bird's nest ferns, or grasstree. "Pandanus" palms are a popular nest site in Mackay. They often renovate and use the old nests of other species, most commonly the grey-crowned babbler ("Pomatostomus temporalis"), but also the chestnut-crowned babbler ("P. ruficeps"), other honeyeaters including noisy ("Philemon corniculatus"), little and silver-crowned friarbirds ("P. argenticeps"), the noisy miner ("Manorina melanocephala") and the red wattlebird ("Anthochaera carunculata"), and artamids such as the Australian magpie and butcherbird species, and even the magpie-lark. In Coen, an old babbler nest in a paperbark ("Melaleuca") which had been lined with messmate bark had been occupied by blue-faced honeyeaters and re-lined with strips of paperbark. Two or rarely three eggs are laid, 22 × 32 mm (1 × 1⅓ in) and buff-pink splotched with red-brown or purplish colours. The female alone incubates the eggs, over a period of 16 or 17 days.
Blue-winged leafbird
The blue-winged leafbird ("Chloropsis cochinchinensis") is a species of leafbird found in forest and second growth throughout Southeast Asia as far east as Borneo and as far south as Java. It previously included Jerdon's leafbird ("C. jerdoni") from the Indian Subcontinent, and the Bornean leafbird ("C. kinabaluensis") from northern Borneo as subspecies, but differs from both in measurements and morphology, with Jerdon's lacking any blue to the flight feathers, and Bornean having a distinctive male-like female plumage. The distribution of the blue-winged and the Bornean leafbird are known to approach each other, but there is no evidence of intergradation.
Blue-headed bee-eater
The sexes are similar and the length of the adult is about . The back and wings are dark brown while the remaining plumage is mostly ultramarine blue. The crown of birds living in the east of the range is blue fading to white on the forehead; western populations have entirely blue heads. The chin and upper throat is scarlet, with a black margin. The belly is a paler shade of blue. The eye is red. In the poor light in the interior of the forest, this bird can be confused with the black bee-eater ("Merops gularis").
Blue-headed vireo
Like most Vireos, the blue-headed vireo is a relatively small bird with a length of . The wingspan is usually found to be around and their weight is typically . There are some subtle differences between the "V.s. solitarius" and "V.s. alticola" sub-species. "V.s. alticola", the larger of the two sub-species, has a darker back with a larger wing length of and a bill length of . Conversely, "V.s. solitarius" is slightly smaller with a wing length of , and a bill length of .
Scooby-Doo (character)
Scooby is brown from head to toe with several distinctive black spots on his upper body and does not seem to have a melanistic mask. He is generally a quadruped but displays bipedal 'human' characteristics occasionally. Scooby also has opposable thumbs and can use his front paws like hands. He has a black nose and wears an off-yellow, diamond-shaped-tagged blue collar with an "SD" (his initials) and has four toes on each foot. Unlike other dogs, Scooby only has one pad on the sole of each of his feet (so that it was easier to draw in the Scooby-Doo Annuals).
Brown booby
The female booby reaches about in length, her wingspan measures up to , and she can weigh up to . The male booby reaches about in length, his wingspan measures up to , and he can weigh up to .
Siblicide
The closely related masked and Nazca boobies are both obligately siblicidal species, while the blue-footed booby is a facultatively siblicidal species. In a facultatively siblicidal species, aggression occurs between siblings but is not always lethal, whereas in an obligately siblicidal species, aggression between siblings always leads to the death of one of the offspring. All three species have an average brood size of two eggs, which are laid within approximately four days of each other. In the few days before the second egg hatches, the first-born chick, known as the senior chick or A-chick, enjoys a period of growth and development during which it has full access to resources provided by the parent bird. Therefore, when the junior chick (B-chick) hatches, there is a significant disparity in size and strength between it and its older sibling.
Blue-breasted bee-eater
The blue-breasted bee-eater, "Merops variegatus," exhibits several physically defining characteristics of the Meropidae family. It has a relatively large head, short neck, bright plumage, long curved slim sharp beak and a broad black eyestripe. "M. variegatus" weights between 20-26 g and measures between 18-21 cm in length. It is primarily a green bird, with a green crown, green upper parts and light greenish-yellow underparts
Blue-headed coucal
The blue-headed coucal is a medium-sized species growing to in length. The sexes are similar, the adult having the head, sides of neck and back black, glossed with blue, the lower back and rump black, the wings predominantly deep chestnut and the tail black, glossed with green or bronze. The underparts are white or pale buff. The eyes are dark red, the beak black and the legs and feet greyish-black. The juvenile is similar to the adult but the black areas are dull rather than glossy; the head is streaked with rufous-buff, the wings are dark chestnut heavily barred with dark brown, and the back and tail are barred with buff. The throat and breast feathers are spotted with black.
Blue-winged parrot
The blue-winged parrot adapts readily to cultivation, and can be maintained in a 3 m (10 ft) communal aviary. It has been crossbred with the elegant and turquoise parrots.
Blue-footed booby
The Peruvian booby is similar in appearance but has grey feet, whiter head and neck, and white spots on its wing coverts. The ranges of the two species overlap in the waters of northern Peru and southern Ecuador.
Blue-headed vireo
Blue-headed vireos are mainly insectivorous birds but are also known to eat fleshy berries and fruit. They are equipped with short, strong bills used for processing insect prey with a tough carapace such as beetles. Foraging usually occurs in the mid level of trees. A foraging blue-headed vireo will hop from branch to branch on the same or to an adjacent tree and will then fly towards its prey to capture it. Typical prey consist mostly of caterpillars, butterflies and moths but may also include tree bugs, stink bugs, beetles, bees, ants, flies, dragonflies, grasshoppers, crickets, spiders and, on some occasions, snails. Fruit feeding occurs primarily during migration and overwintering, especially when overwintering in more tropical regions where fruit is more abundant or if the insect populations are low. This large and varied diet is an example of an opportunistic feeding strategy, allowing the blue-headed vireo to be plastic in its ability to adapt to resource availability.