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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.
19 de may. de 2024 · Learn about birds, the only living animals with feathers, from Britannica. Explore their evolution, anatomy, behavior, ecology, and cultural significance.
Explore species accounts, maps, multimedia, and family overviews for all 11,017 bird species. Subscribe to access full content, watch webinars, and learn about avian phylogeny and ecology.
Explore the diversity and adaptability of birds with stunning photos, videos, and stories. Learn about their anatomy, evolution, behavior, and conservation.
18 de ago. de 2015 · eBird: como empezar. Bienvenido a eBird! Ahora formas parte de una red mundial de observadores de aves, investigadores, y conservacionistas—unidos gracias a nuestro interés compartido con respecto a las aves y el mundo natural. Más de 200,000 personas han usado eBird, ingresando más de 260 millones de observaciones de aves de todos los ...
All About Birds is your free online guide to birds and bird watching. Explore in-depth species information, tips from the Lab’s experts, and inspirational v ...
Learn how to identify birds by using clues, tips, guides, and rules from Audubon experts. Find out how to tell apart similar species, recognize common birds, and enjoy birding.
