For the Birds

by U.S. Fish and Wildlife Service

http://www.birding.about.com/hobbies/birding

Backyard Wildlife Habitats—National Wildlife Federation

http://www.nwf.org/habitats

Cats Indoors—American Birding Conservancy

http://www.abcbirds.org/cats/catsindoors.htm

North American Bluebird Society

http://www.nabluebirdsociety.org

Purple Martin Conservation Association

http://www.purplemartin.org

BirdSource—FeederWatch and Classroom FeederWatch