动物 - 鸟类的解剖学

any of the two parts of the body of a bird, insect, etc. used for flying

a prominent feature exhibited by some birds on their heads, consisting of feathers, fur, or skin

the hard or pointed part of a bird's mouth

a Y-shaped bone between the neck and breast of a bird

a sharp and curved nail on the toe of an animal or a bird

the main and longest feathers on a bird's wing that help it fly