Andean ultrasonics: Bioacoustics of two tropical montane katydids
Keywords:Locomotives, Railroad cars, 12 pulse, Pulse train, Sound radiator
AbstractA study was conducted to investigate bioacoustics of two Montane Katdid species of insects. Investigations revealed that these insects were able to produce and hear ultrasonics. They rubbed their forewings, which excited the oscillation of forewing membranes as sound radiators. It was observed that male calls traveled through grasses, shrubs, and forests to be heard by distant females who locate the singer and approach it for mating. The two insect species comprised the genus Myopophyllum that had a significantly high ultrasonic carrier. These insects produced a call that consisted of two brief pulse trains. The first train had 9 pulses in 50 ms, while a second train of 12 pulses was given after an interval of 50 ms. The pulses in the trains were short, sinsusoidal, and set relatively far apart in time.
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