Maps
Ometepe was designated a World Biosphere Reserve Site in 2010. As part of this, Unesco produced some great maps showing vegetation cover (cobertura vegetal, including coffee areas), the eight distinct ecosystems on the island, natural hazards, temperatures, and zoning.
Birds
Download a checklist of birds on Ometepe, complete with color pictures and a handy guide that compares English, Spanish and Nicaraguan names for 22 noteworthy birds.