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. …

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

2025年11月29日 · 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 …

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

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, …

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.

2025年5月6日 · 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 …

Unlock species accounts, maps, multimedia, and bird family overviews. For public and academic libraries, government agencies, consulting firms, nature centers, nonprofits, and more. For Cornell Lab Chairman's Council members, AOS members, Public Libraries, Bird Clubs and other …

Discover bird species in Williamsport! Learn about common backyard birds, migration patterns, and the best birdwatching spots in Williamsport, Pennsylvania.