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. …

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

Dec 17, 2025 · 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 …

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...

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Explore Species Maps, stats, photos, and sounds for any bird in the world, including personalized stats based on your eBirding Surprise me!

Many people are curious about the wide variety of birds they encounter, and putting names to those birds is a rewarding experience. We’re here to help with resources to help you, from our …

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

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 …

Although not all species of bird can fly (sorry about that, ostriches), many birds do enjoy the power of flight, and this has permitted an almost unlimited diversification of birds, so that birds are …