The following web sites have links to the BIRD TREKS site. You might want to take a look at them.
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- Audubon Magazine
- Baltimore Birdline
- Bird Forum
- Birding in Spain
- Birds of New England
- Birds of Prey
- BiRDZiLLA
- Buteo Books specializes in Ornithology books, with one of the largest selections of new, used, and rare birding books in the world, and a knowledgeable staff to assist you.
- Cecil County, MD Bird Club
- Costa Rica Gateway - "the birding and nature specialists"
- Eagle Optics
- Harford County, MD Bird Club
- Kenya's Rondo Retreat
- Lancaster County (PA) Bird Club
- Maine Birding Information
- Mark Pretti Nature Tours
- Natural Traveler e-magazine
- Nestbox
- The O.W.L. Commercial Travel Services for Birders
- Pennsylvania Society for Ornithology
- Peterson Online
- San Diego Birding
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- The virtual birder
- West Chester Bird Club