What is Anna's hummingbird?
{{Taxobox | name = Anna's hummingbird | status = LC | status_system = IUCN3.1 | image = Anna's Hummingbird - male flying.jpg | image_width = 256px | image_caption = Adult male in-flight, colouring unclear | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[Aves]] | ordo = [[Trochiliformes]] | familia = [[Trochilidae]] | genus = ''Calypte'' | binomial = ''Calypte anna''}} [[File:AnnasHummingbirdPaloAltoNorvig.jpg|thumb|right|250px|male Anna's hummingbird]] '''Anna's hummingbird''' (''Calypte anna'') is 9 to 10 centimetres (3.5 to 3.9 in) long. It has a bronze-green back, a light [[grey]] chest and belly, and [[green]] flanks. Its bill is long, straight and slender. The adult male has an [[iridescence|iridescent]] crimson-red crown and throat, and a dark, slightly forked tail. Anna's is the only North American [[hummingbird]] [[species]] with a [[red]] crown. Females and young have a green crown, a grey throat with some red markings, a grey chest and belly, and a dark, rounded tail with white tips on the outer feathers. These birds feed on nectar from [[flowers]] using a long tongue. They also eat small [[spider]]s and [[insect]]s caught in flight. While [[wikt:collecting|collecting]] nectar, they also help in plant [[pollination]]. This species sometimes eats tree sap. {{commonscat|Calypte anna}} {{wikispecies|Calypte anna}} {{biology-stub}} [[Category:Birds of North America]] [[Category:Hummingbirds]]