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/