The waxy monkey tree frog is a very interesting frog because it inhabits dry prairie land in South America.
Waxy monkey tree frog (Phyllomedusa sauvagii) in the Toronto Zoo.
That kind of environment is too hot and dry for most frogs to even stay alive. The waxy monkey frog manages to stay alive in such an environment by covering itself with a waxy substance secreted by glands on its neck. Thus the waxy part of its name. It is called a money frog because it walk/climbs on the trees instead of hopping.
Waxy monkey tree frogs never go into the water, not even to breed. They mate up in the trees and lay their eggs on leaves during the rainy season and then the newly hatched tadpoles fall into the water underneath.
Some people like to keep a waxy monkey tree frog as a pet. Apparently they can do well and even breed in captivity if one can take proper care of them.
Further Readings:
Phyllomedusa sauvagii on Wikipedia.
Waxy Monkey Tree Frog Care