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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.
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
Hace 6 días · Learn about birds, the only living animals with feathers, from Britannica. Explore their evolution, diversity, behavior, ecology, and cultural significance.
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
Explore the diversity and adaptability of birds with stunning photos, videos, and stories. Learn about their anatomy, evolution, behavior, and conservation.
Learn about birds, the only animals with feathers and wings. Explore different types of birds, see photos, videos, puzzles and games.
Learn about more than 800 bird species in North America, their habitats, and how climate change affects them. Listen to bird songs and calls, and filter by bird name, family, or region.
