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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.
Explore more than 800 North American bird species, learn about their lives and habitats, and how climate change is impacting their ability to survive.
Jun 22, 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.
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
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.
About Birds. Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found...
Detailed information for more than 600 North American bird species, including ID help, browse by shape and taxonomy, and deeper articles.
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 ...
Birds Need You Now. Generous people like you power our work to protect birds and the places they need. One time. Monthly. Donate. Audubon protects birds and the places they need, today and tomorrow.
Birds are warm-blooded vertebrates (vertebrates have backbones) and are the only animals with feathers. Although all birds have wings, a few species can't fly.
