Being warm year-round, Costa Rica has an abundant assortment of animals, birds, insects, reptiles, and all sorts of wildlife. I was expecting to see sign of more mammals, but monkeys were the only abundant animal around. We did see a sloth in the wild, and a coatamundi, plus a few snakes and reptiles.
On the other hand, birds and butterflies were abundant! So were insects.
Here is a sample of the fauna along the trail.