What does the northern leopard frogs call sound like, and why do they call?
Leopard frogs make four different kinds of calls. Their vocalizations can represent advertisement, aggression, courtship rituals, or defense. They can even make their calls underwater! Generally, their advertising call is a hoarse croaking followed by two clucks, and their aggressive calls consist of short chuckles. Calls vary among individuals, however, and are hard to interpret.