Gillespie, Thomas Welch, and Hartmut Walter. "Distribution of Bird Species Richness at a Regional Scale in Tropical Dry Forest of Central America." Journal of Biogeography 28 (2001): 651-62. Print.
Gillespie, Thomas Welch. "Biological Inventory of the Ometepe, Nicaragua." (n.d.): n. pag. Print.
Physical Geography
McCarthy, Carolyn, and Robert Reid. Lonely Planet Central America on a Shoestring. Footscray, Vic.: Lonely Planet, 2010. Print.