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. http://www.birdsource.org/
A family of franchise stores serving the backyard birdwatcher, with bird resources, activities, and information about products. http://www.wildbird.com/
Photographs, descriptions to aid identification, and notes on the birds that visit a suburban garden in Sheffield, England. http://www.garden-birds.co.uk/
U.S. non-profit group with information on bird seed, bird feeders, plus projects for kids, nestbox plans, and educational materials. http://www.birdfeeding.org/