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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.
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
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
1 de may. de 2024 · 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.
Learn about birds, the vertebrate animals adapted for flight, from National Geographic. Explore photos, videos, and stories of different bird species, their anatomy, behavior, and evolution. Discover how birds are related to dinosaurs and how they adapt to various habitats and challenges.
birding, and opportunities to help bird conservation. Use our Bird Guide to identify birds, learn about the life history, listen to the sounds, and watch bird behavior on video--the most comprehensive guide to Nort.
Learn about birds, the only animals with feathers and wings. Explore different types of birds, see photos, read facts and play games.
