» BirdSource 
- Joint project of National Audubon and the Cornell Lab of Ornithology with the complete Christmas Bird Count database, Project FeederWatch, BirdCast, HawkWatch results, Great Backyard Bird Count, and feature articles.
» Patuxent - Bird Population Studies - Data on North American birds, including the Breeding Bird Survey, Christmas Bird Count trends, migratory bird projects, the Bird Identification InfoCenter, checklists, ID tips, and quiz.
» American Bird Center - Links related to birds and birding in the United States and Canada.
» American Birding Association - North America's largest membership organization for active birders, with news, details on publications and programs, and birding resources.
» The Bird Guide - Site guides, identification articles, and links for the Pacific Northwest, including Oregon, Washington, California, Idaho, and British Columbia.
» Bird Lists - North America - Checklists and links for all US states, Canadian provinces, and outlying areas.
» Bird Records Committee Forum - Archives of the e-mail group for discussion of issues pertaining to groups that evaluate rare bird reports.
» Bird Watcher's Digest - Magazine for birdwatching, birding, backyard bird feeding, bird gardening, bird identification, bird travel, and birding products.
» BirdBand - Archives of the forum for bird banders.
» BirdCntr - Archives of the e-mail group for central US/Canada rare bird alerts.
» BirdEast - Archives of the e-mail group for eastern US/Canada rare bird alerts.
» Birdfilms.com - Videos and DVDs on the lives and natural habitats of North American birds by Michael Male and Judy Fieth.
» BirdHawk - Archives of the Hawk Migration Association of North America e-mail group.
» BirdIQ - Site from ConocoPhillips with basic information on birds, bird watching, and feeding for students, teachers, and anyone interested in learning more.
» Bird_RBA - Archives of the e-mail group for reports of continentally rare birds.
» Birds of North America - A reference series on North American birds, with information and sample profiles.
» Birdwatching - Frequently asked questions, birding tips, articles, and store.
» BirdWest - Archives of the e-mail group for western US/Canada rare bird alerts.
» Birdzilla - Sightings, newsletter, articles, species profiles including the complete text of Bent's Life Histories, bird lists, photos, backyard birding, and shopping.
» Boreal Songbird Initiative - Dedicated to educating birdwatchers and naturalists about the importance of the boreal forest of North America to migratory birds.
» Cornell Laboratory of Ornithology - A membership institution interpreting and conserving the earth's biological diversity through research, education, and citizen science focused on birds.
» eBird - Project developed by the Cornell Lab of Ornithology and the National Audubon Society, provides a simple way to keep track of the birds you see anywhere in North America.
» eNature Birds - Species accounts of North American birds, including images, descriptions, and sounds.
» Familiar Birds - Full text of some of the species accounts of more common birds by Arthur Cleveland Bent from his classic Life Histories of North American Birds (1919-1968).
» George West's Birding Homepage - Photo gallery, trip reports, Arizona hummingbird banding program, and updates to "A Birder's Guide to Alaska".
» Hawk Migration Association of North America - Monitors raptor migration throughout North America.
» HawkCount - Daily reports of migrant hawks seen at many North American hawk watch sites.
» Hummingbirds - Photograph album, migration maps, attracting and feeding tips, species accounts, and articles.
» Index to the Archives of Birding Email Lists - Links to searchable archives of U.S. and Canada birding email groups.
» Internet Field Guide to Birds - Keys to identify North American species online; from The BioDiversity Institute. Includes photo gallery.
» John James Audubon's Birds of America - Audubon's images and original text descriptions from an 1840 (First Octavo Edition) of Audubon's complete seven volume text.
» The Nature Conservancy - Migratory Bird Program - Programs to protect critical habitats for birds throughout the Western Hemisphere. Species abstracts, fact sheets, and links.
» North America Rare Bird Alert - Subscription reporting service on rare birds in the United States and Canada.
» North American Bird Notes - Notes, distribution maps, and photos of current rarities. Includes gull section and bird quizzes.
» North American Bird Photography Gallery - Photographs of many species by Peter LaTourrette.
» North American Bird Sounds - Doug Von Gausig's site with bird songs, other sounds, and some explanatory text.
» Obsolete English Names of North American Birds - Thorough list of old names of North American and Hawaiian birds and their modern equivalents.
» Old Bird, Inc. - Information about the Flight Calls of Migratory Birds (Eastern North American Landbirds) CD-ROM and the Dickcissel night flight call monitoring project.
» On Silent Wings Bird Photography - Photographs of birds from the ABA North American region, with birding and photograph links for beginners to experts.
» Partners in Flight - An association supported by federal, state, and regional governments dedicated to the preservation of bird species that summer in North America and winter in South America. Volunteer information and species data.
» Peterson Birding Resources - Links and list of bird spectacles.
» Sibley Guides - Information about the Sibley Guide to Birds, including updates, subspecies, and a gallery of David Sibley's paintings.
» Suite101: Birds - Articles and links on different topics related to birds and birding.
» TeenBirdChat - E-mail group for young birders.
» The Virtual Birder - Virtual birding tours of North America's leading hot spots, articles, rare bird alerts, e-mail discussion group archives, and photo galleries.
» WBBA Species Audio Library - Collection of 200 bird song audio recordings in high-quality MP3 format. All recordings were made in Wisconsin.
» WhatBird - A step-by-step parametric search engine for identifying birds in North America. Illustrations, calls, and links.
