Beginning at 1,400 meters and continuing up to near the peak, the woods are low and the densely-branched trees are covered with mosses and other epiphytes. The most common trees are the cupey, didymopanax and crespon. The peak of the volcano is covered with ash and has very sparse vegetation. Plants include the cupey and the poor man's umbrella. The tapir, highland tinamous, black guan and several cat species are very numerous in this region.
Insects are very numerous and include four species of the abundant and beautiful morpho butterflies.