All Experts Birding
   A panel of US birders volunteer to answer questions.
   http://www.allexperts.com/getExpert.asp?Category=1435

American Bird Conservancy
   A not-for-profit dedicated to the conservation of wild birds and their habitats in the Americas.
   http://www.abcbirds.org/

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.
   http://pica.wru.umt.edu/BBIRD/

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.
   http://www.npwrc.usgs.gov/resource/othrdata/chekbird/chekbird.htm

BirdBrain
   A birding portal with learning games, links to news articles, photos, sound files, and links.
   http://ebirdbrain.com/

BirdCentral
   Photo gallery by Jim Rosso; birds in the classroom project.
   http://birdcentral.net/

BirdPerch
   Photo gallery, magazine photo index, and list of places to bird.
   http://www.birdperch.com

BirdWatch
   PBS television series on birds and birdwatching.
   http://www.pbs.org/birdwatch/

Birding Tidbits
   Crossword puzzles.
   http://home.epsb.net/~slivings/

Birds in Nature
   Photographs of wild birds by Richard Ditch. Includes an extensive tutorial and information on many aspects of bird photography.
   http://home.earthlink.net/~richditch/

Birds: Bellwethers of Watershed Health
   Educational resource on the importance of birds as watershed health indicators and how to improve watershed conditions.
   http://www.epa.gov/watertrain/birds/

Birdwatch America
   Supports the business of birding in the US.
   http://www.birdwatchamerica.com/

Birdwatching in the National Parks
   Links to articles and checklists for finding birds on National Park Service land throughout the US.
   http://www.nps.gov/oia/NPSBirds.html

Identification Issues
   Don Roberson's detailed discussions and photos of 10 ID problems, mainly dealing with California birds.
   http://montereybay.com/creagrus/identification.html

National Birder's Forum
   Chat for beginning birders.
   http://groups.yahoo.com/group/nationalbirdersforum/

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.
   http://www.neseabirds.com/

Northern Prairie Wildlife Research Center
   Large number of articles with detailed information about United States birds.
   http://www.npwrc.usgs.gov/resource/taxa_n.htm

Nutty Birdwatcher
   Eastern U.S. site with tips for backyard birding, bird migration table, and identification guides.
   http://nuthatch.birdnature.com/

Robert Winkler - Nature Writing
   Excerpts, reviews, bird photos, and links from the author of "Going Wild: Adventures with Birds in the Suburban Wilderness".
   http://pages.cthome.net/rwinkler/

SEPART-L
   Archives and subscription management for the e-mail group for discussion of neotropical migratory birds in the southeastern United States.
   http://listserv.uark.edu/archives/separt-l.html

Scouting for Birds
   Promotes the Boy Scouts' Bird Study Merit Badge, with guides for scouts and teachers.
   http://k2gw.tripod.com/birdstudy/

State Birds
   The official state birds of every state and tips on how to find them.
   http://www.webspawner.com/users/p389/

Trochilids
   Winter western hummingbird reports from Mississippi, Louisiana, and the eastern US.
   http://www.trochilids.com/

Ya Know You're a Birder
   Bird comics and backyard birding.
   http://lightning.prohosting.com/~ees101/birds/comicindex.htm