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.
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.