| All Experts Birding: A panel of US birders volunteer to answer questions. |
| American Bird Conservancy: A not-for-profit dedicated to the conservation of wild birds and their habitats in the Americas. |
| BBIRD - Breeding Biology Research and Monitoring Database: A national, cooperative program that uses standardized field methodologies for studies of nesting success and habitat requirements of breeding birds. |
| Bird Checklists of the United States: Hundreds of seasonal occurrence bird checklists for state, federal, and private management areas, nature preserves, and other areas of special interest in the United States. |
| BirdBrain: A birding portal with learning games, links to news articles, photos, sound files, and links. |
| BirdCentral: Photo gallery by Jim Rosso; birds in the classroom project. |
| Birding Tidbits: Crossword puzzles. |
| BirdingGuide.com: Information, resources, and links for bird watching. |
| BirdPerch: Photo gallery, magazine photo index, and list of places to bird. |
| Birds in Nature: Photographs of wild birds by Richard Ditch. Includes an extensive tutorial and information on many aspects of bird photography. |
| Birds: Bellwethers of Watershed Health: Educational resource on the importance of birds as watershed health indicators and how to improve watershed conditions. |
| BirdWatch: PBS television series on birds and birdwatching. |
| Birdwatch America: Supports the business of birding in the US. |
| Birdwatching in the National Parks: Links to articles and checklists for finding birds on National Park Service land throughout the US. |
| Identification Issues: Don Roberson's detailed discussions and photos of 10 ID problems, mainly dealing with California birds. |
| New England Seabirds and Pelagic Birding: Conservation news, checklists of birds and mammals, birding spots, pelagic trips and trip reports, seabird breeding colonies, and tips for a first pelagic trip. |
| Northern Prairie Wildlife Research Center: Large number of articles with detailed information about United States birds. |
| Nutty Birdwatcher: Eastern U.S. site with tips for backyard birding, bird migration table, and identification guides. |
| Robert Winkler - Nature Writing: Excerpts, reviews, bird photos, and links from the author of "Going Wild: Adventures with Birds in the Suburban Wilderness". |
| Scouting for Birds: Promotes the Boy Scouts' Bird Study Merit Badge, with guides for scouts and teachers. |
| SEPART-L: Archives and subscription management for the e-mail group for discussion of neotropical migratory birds in the southeastern United States. |
| State Birds: Official birds for each US state with illustrations and descriptive text by Audubon. |
| State Birds: The official state birds of every state and tips on how to find them. |
| Trochilids: Winter western hummingbird reports from Mississippi, Louisiana, and the eastern US. |
| Ya Know You're a Birder: Bird comics and backyard birding. |
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