Search Results for: Animal bones
warm-blooded , oviparous (egg-laying) vertebrates characterized primarily by feathers , forelimbs modified as wings , and a bony beak without teeth. common characteristics of birds include the laying of hard-shelled eggs , high metabolic rate, and a light but strong skeleton, generally with hollow bones
are characterized by flight. many birds migrate long distances to utilize optimum habitats (e.g., arctic tern), while others spend almost all their time at sea (e.g., the wandering albatross). some, such as frigatebirds, stay aloft for days at a time, even sleeping on the wing. the fastest living animal...
https://www.newworldencyclopedia.org/entry/Bird