Search Results for: Pure-bred breeding animals
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. the only animals
rhinoceroses, or within the mouths of crocodiles. most birds are diurnal, or active during the day. some birds, such as the owls and nightjars, are nocturnal or crepuscular (active during twilight hours). many birds seasonally migrate long distances, improving opportunities for food, better climate, and breeding...
https://www.newworldencyclopedia.org/entry/Bird