Birding Comparisons - Central America
   A summary of families, species, endemics, and specialties for 7 Central American nations.
   http://camacdonald.com/birding/Comparisons-CentralAm.htm

Mayan Birding
   Information on birding in El Salvador, Honduras, and Guatemala. Includes maps, site guides, photo galleries, and trip planning advice.
   http://mayanbirding.com/

Neotropical Bird Club
   UK-based club for birds and birding in South America, Central America, and the Caribbean. Cotinga journal tables of contents and some feature articles, bulletin board, conservation awards, sales, news, and photos.
   http://www.neotropicalbirdclub.org

Xeno Canto
   Comprehensive collection of bird songs from South and Central America. Includes a database of recordings, a forum, links, and FAQs.
   http://www.xeno-canto.org/