Common traits that distinguish
birds: feathers, horny, beak, strong skeleton, hard-shelled, large yoked eggs.
Birds generate sound by stretching the membrane within the syrinx and also,
amazingly enough, with the medial and lateral. The medial and lateral are two
labia that move to close air passages, regulate flow. Birds hear in a
similar way to humans. They have three parts to their ears, an inner, middle,
and outer ear, like humans, but birds lack a pinna, the visible external part of
the ear, which collects sound and guides it to the outer ear canal to the ear
drum.
Orders of Birds:
Ducks, geese, screamers, swans, and waterfowl
Hummingbirds and swifts
Nightbirds
Relatives and shorebirds
Albatrosses, alcids, auks, cormorants, diurnal birds of prey, eagles, falcons, falconiforms, flamingos, grebes, gulls, hawks, herons, ibises, loons, osprey, oystercatchers, pelicans, penguins, petrels, plovers, relatives, and storks
Colies and mousebirds
Doves and pigeons
Kingfishers, relatives, and rollers
Chacalacas, curassows, guans, and megapodes
Cuckoos, hoatzin, relatives, and turacos
Diurnal birds of prey
Chicken-like birds, fowls, and gallinaceous birds
Loons
Coots, cranes, and rails
Perching birds
Pelicans and relatives
Flamingos
Relatives and woodpeckers
Grebes
Tube-nosed seabirds
Parrots
Penguins
Goatsuckers and owls
Cassowaires, emus, kiwis, ostriches, and rheas
Tinamous
Trogons
Buttonquail