The toe pads also secrete mucous to help them climb vertical surfaces. Their skin is slightly rough, gray or light green in color to resemble the lichens growing on tree bark. These frogs have the ability to change color, and they tend to be darker if they are cold or if the environment is dark. Their undersides are white with a granular appearance. Males have a bright orange wash on the backs of the thighs and groin, and they also have dark gray or black throats.
Females have light throats.
Adults grow to be 32-60 mm long. They also like sandy, pine barren habitats. Gray Treefrogs cover the eastern states except northern Maine and southern Florida. Gray Treefrogs are seen during early spring rains well into the autumn months. Adults are nocturnal.