Voice Home Range and Distribution Reproduction Habitat Behavior Voice Status Conservation Literature Links Males have well-developed voices, most likely related to breeding sites and season, which can increase the ability to mate with potential females. Voice is loud, and the number of croaks averaging 75 or 80 a minute (Stebbins, 1951). Their mating calls can be heard half a mile away or more. The voice has a rolling trill like the purr of a cat (Behler & King, 1996).