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Monday, November 23, 2009

Photo: Ultrasonic Frog Tunes Its Ears Like a Radio Dial


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The concave-eared torrent frog is the only animal known to actively select which frequencies it hears but opening and closing parts of its ears, new research reports.

Scientists think the frog's unusual ears and ultrasonic calls are adaptations to its noisy streamside environment.

Photograph courtesy Albert Feng