While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is transparent and translucent. The internal viscera, including the heart, liver, and gastrointestinal tract, are visible through the skin, hence the common name is given as glass frog. Glass frogs are arboreal, meaning they mainly live in trees, and only come out for mating season.
Glass frogs are generally small, ranging from 3 – 7.5 cm in length. They are green in color over most of their bodies, except for the skin along the lower surface of the body, which is transparent. The eggs are usually deposited on the leaves of trees or shrubs hanging over the running water of mountain streams, creeks, and small rivers. In many species, glass frog females brood their eggs during the night the eggs are fertilized, which improves the survival of the eggs, while in almost a third of species, glass frog males stay on guard for much longer periods. After they hatch, the tadpoles fall into the waters below.
Glass frogs have incredible appetites, and there is a vital need to have a constant supply of small insects available for them when they are active at night.