Great frogs! In this particular species, both sexually mature males and females will call. The males will have black nuptial pads on their fingers while the female has an enlarged cloaca (vent). Females have two distinct calls - a rapid, rapping sound (female is receptive to male advances) that the male will respond to wildly, or a slow, ticking call which will break off any relationship and the male will abruptly stop calling. Just wait for some wild duets which can get quite loud.