... a sharp response boundary between the frequencies of song and bat cries, resembling categorical perception first described in the context of human speech. * Author for correspondence at present address: Department of Anatomy and Neurobiology, Northeastern Ohio Universities College of Medicine...

... and aggressive calls( Gerhardt, 1978 ). In categorical perception – used, for example, in the Polynesian field cricket's identification of conspecific mating calls and predator bat echolocation calls – differences along a continuum are perceived with greater acuity at category boundaries than within the range...