a bushcricket
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Chirp Like A SawThis bushcricket may be tiny, but males can chirp as loud as a power saw to attract females, a new study says.Using highly calibrated microphones, researchers recorded male bushcrickets in Colombia singing at frequencies of about 74 kilohertz. The human ear can hear in a range of about 20 hertz to 20 kilohertz.

The males produce sound through "stridulation," or rubbing their wings together. One wing acts as a scraper to rub against a row of teeth-like grooves on the other wing. (Watch a video of the bushcricket chirping.)

The bushcricket is notable for another reason: It had been thought extinct, said study co-author Ben Chivers.Since 1891, no new descriptions of the species Arachnoscelis arachnoides had been recorded or published. But after one of his co-authors rediscovered a population of the bushcricket in Colombia, the researchers were able to gather a sample and study their cacophonous chirps, according to the study, published recently in the Journal of Bioacoustics. (Also see "Urban Grasshoppers Sing Louder.")"The species had not been described for over a hundred years, so it was quite a good thing we could get a hold of some and create a detailed description," said Chivers.—Jaclyn Skurie and Rachel Kaufman

Photograph courtesy Natasha Mhatre

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