We seem to have a lot of these neat tropical frogs here at Banana Azul, one of 7 different species of “Poison Dart Frogs” in Costa Rica. Read about them on Wikipedia. Or see my other photos of them at Poison Dart Frogs: Green & Black. or my whole Amphibians gallery.
Why are frogs so happy? They eat whatever bugs them!
See also my TRIP GALLERY: 2019 Banana Azul, Puerto Viejo