Most people perceive frogs can only be found on wet grounds. There are actually a number of tree climbers such as Brown Tree Frog. Brown Tree Frog fits well into the arboreal life with the well-developed suction discs at the end of its digits. It can live in areas with barely enough water. During the breeding season in summer, the mating calls of Brown Tree Frog are low, rattling sounds resembling a machine gun.