In Costa Rica you can find different frog species including: poison-dart frog (Dendrobatis granuliferus), gaudy leaf frog (Agalychinis callidryas), glass frog (Centrolenella spp.), red and blue poison-dart frog (Dendrbates pumilio).
The best places to find them are:
How to find them?
The “g” word – guide. They know the frogs’ favorite hiding-holes and have uncanny ability for spotting them despite their small size. If you are on your own, watch for moist leaf litter, decomposing trees, and large-leafed plants, such as, poor man’s umbrella and philodendrons. Areas around streams, lakes and marshes also tend to have large populations.
If you find them, walk quietly; sudden noises will make the frogs freeze thus making them more difficult to spot.