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Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Hace 2 días · Bird, any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from other animals. They are warm-blooded vertebrates more related to reptiles than mammals. Learn more about birds in this article.
Birds of the World is a powerful resource that brings deep, scholarly content from four celebrated works of ornithology into a single platform where biologists and birders can find comprehensive life history information on birds. Every bird has a story. Discover them all with Birds of the World. About Birds of the World; Team; Subscribe
traducir BIRD: ave, pájaro, chica, volante, pájaro [masculine]. Más información en el diccionario inglés-español.
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
16 de jun. de 2021 · Birds are found worldwide and in all habitats. The largest is the nine-foot-tall ostrich. The smallest is the two-inch-long bee hummingbird. Everything about the anatomy of a bird reflects its ...
Guía de Aves. Explore más de 800 especies de aves de América del Norte, aprenda sobre sus vidas y hábitats, y cómo el cambio climático está afectando su capacidad para sobrevivir.
