Seeing with Sound and Scent
Each species of Katydid has its own rasping song, produced by stridulation, whereby the forewings, one of which is ridged, are rubbed together. Although katydid songs are species-specific, different species are able to hear one another’s calls. Songs differ as to their purpose, being either reproductive, territorial, aggressive, or defensive in nature.
Most common cricket songs are the calling song, which attracts the female; the courtship, or mating, song, which induces the female to copulate; and the fighting chirp, which repels other males. Both sexes have highly sensitive organs on the forelegs for sound reception. There is a direct relationship between the rate of cricket chirps and temperature, with the rate increasing with increasing temperature.
Known for their buzzing and clicking noises, which can be amplified by multitudes of insects into an overpowering hum. Cicada noises may sound alike to humans, the insects use different calls to express alarm or attract mates.