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Created 27-Aug-09
Modified 25-Feb-10
Birds (class Aves) are winged, bipedal, endothermic (warm-blooded), vertebrate animals that lay eggs.

Las aves son animales vertebrados, de sangre caliente, que caminan, saltan o se mantienen sólo sobre las extremidades posteriores, mientras que las extremidades anteriores están modificadas como alas que, al igual que muchas otras características anatómicas únicas, son adaptaciones para volar, aunque no todas vuelan. Tienen el cuerpo recubierto de plumas y, las aves actuales, un pico córneo sin dientes. Para reproducirse ponen huevos, que incuban hasta la eclosión.


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