The continental origin and proximity of Trinidad to South America, as well as a multiplicity of habitats, have resulted in an unusually diverse fauna. The species lists are impressive: 108 mammals; 460 birds; 55 reptiles; 25 amphibians; and 617 butterflies. No other area in the West Indies, and few, if any, areas of comparable size in tropical America, can match this species diversity.
The climate at the Asa Wright Nature Centre is tropical and humid. However, its mid-montane location tempers the heat to a very pleasant 65-86 degrees F. (18-30 C.). The long dry season, when the most striking vegetation is in bloom, lasts from January until May. A shorter dry season occurs again in October. The balance of the year constitutes the rainy season. Rains, while they can be frequently torrential, are usually very intermittent and good field observations can be made at the Centre throughout the year.top