Per square kilometer, it is the most biodiverse country.
You can find about 232 species of mammals, over 910 species of birds, 183 species of amphibians, 258 species of reptiles and 130 species of freshwater fish. About 500 000 species of insects and 20 000 of plants.

We can find from the small Hummingbird with just a few grams to the Tapir with over 150 Kg in weight. Orchid flowers barely bigger than a pinhead and towering trees like the Ceiba, over 40 meters high.