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

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

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

3 days ago · 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 …

Join us and help create a future where birds, nature, and people can thrive. We believe that people make the difference in every conservation challenge. Through participatory science …

May 6, 2025 · Birds are warm-blooded vertebrates characterized by feathers on their bodies, toothless beaked jaws, hard-shelled calcareous eggs, and a four-chambered heart with a high …

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...

Mar 26, 2024 · Birds are a class of warm-blooded vertebrates with distinguishing features including feathers, wings, and beaks. They are renowned for their remarkable diversity, …

Struggling to identify a bird or find the perfect birding spot? Browse our interactive map and data from over 1 billion sightings to find new places to go birding.

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