Birds are a group of warm-blooded vertebrate animals constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four …

Detailed information for more than 600 North American bird species, including ID help, browse by shape and taxonomy, and deeper articles.

Explore more than 800 North American bird species, learn about their lives and habitats, and how climate change is impacting their ability to survive.

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 ...

May 4, 2026 · Bird, any of the approximately 11,200 living species unique in having feathers, the major characteristic that distinguishes them from other animals. They are warm-blooded vertebrates more …

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...

eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.

Oct 25, 2025 · Birds (Class Aves) are endothermic, feathered vertebrates characterized by beaks without teeth, egg-laying reproduction with hard-shelled eggs, and (in most species) the ability to fly. …

Discover them all with Birds of the World. Species accounts for all the birds of the world.

Mar 18, 2026 · Protect the nature of Michigan for birds and people. Our success is made possible by the commitment of our more than 2,500 members statewide. Join, renew, or give the gift of membership …