Ratitae (Palaeognathae) A group comprising the flightless birds, including the ostrich, kiwi, and emu. They have long legs, heavy bones, small wings, a flat breastbone, and curly feathers. These birds are thought to have descended from a variety of flying birds and are not representatives of a single homologous group.
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Bird , Birds A bird is a warm-blooded vertebrate (an animal with a backbone) that has feathers, a beak, and two wings. Its most unique feature is the abilit… ratite , ratite A flightless, running bird that has no keel on its sternum. Aepyornithidae, Apterygidae, Casuariidae, Dinornithidae, Dromaiidae, Rheidae, and… Aves , Aves Eggs and poultry make up a significant part of peoples' diets. Similarly, products made from feathers such as pillows, comforters, or down-lined… Ornithology , Ornithology is the branch of zoology that deals with birds. It includes the study of the development, anatomy (structure), physiology (function), beh… Mockingbird , mockingbird •absurd, bird, Byrd, curd, engird, gird, Heard, herd, Kurd, misheard, nerd, overheard, reheard, third, turd, undergird, undeterred, unhea… Flight , Flight Three different groups of animals—insects, birds, and mammals—include species that have evolved the ability to fly. This ability developed ind…
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