National Audubon Society
Northeast Texas Field Ornithologists
This site promotes observation, study, appreciation and conservation of birds through discovery and dissemination of knowledge about birds, particularly in the Northeast Texas area.
Cornell Lab of Ornithology
This Cornell bird identification website is a good general purpose identifier with basic species information and songs. I particularly like to click the "related species" link for a bird and get the nice columnar list of related birds with sound files Home of the Great Backyard Bird Count. Participate in citizen science research projects. Great overall bird info resource.
American Birding Association
Great source for recreational birders. The ABA encourages birders to apply their skills to help conserve birds and their habitats.