Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are over 11,000 living species and they are split into 44 orders. More than …

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.

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 projects, …

Jan 24, 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 …

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. …

Feb 11, 2026 · eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.

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 21, 2025 · From the striking Roseate Spoonbill to the powerful Bald Eagle, the birds of Florida are as diverse as the landscapes they call home. In this article, we’ll look at some of the most fascinating …

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