If you would like a nature list compiled by a student studying for his Masters I would be glad to send it to you.
This survey was made by personal observations and sources such as "The Ecological Map of Costa Rica. The following life zones as defined by Holdridge are: below 400m, premontane wet forest climatic association with a rich epiphyte load with mostly steep and broken terrain. About 40 to 50% of the area is "Old Growth Forest with the remainder, second growth forest, at various stages of regeneration. The list was obtained by means of Finding, Capturing, Identifying, and Releasing butterflies and amphibians and observing mammals, however Bats are excluded from this list.