Female concave-eared frogs draw mates with ultrasonic calls

Most female frogs don’t call; most lack or have only rudimentary vocal cords. A typical female selects a mate from a chorus of males and then –silently – signals her beau. But the female concave-eared torrent frog, Odorrana tormota, has a more direct method of declaring her interest: She emits a high-pitched chirp that to the human ear sounds like that of a bird. This is one of several unusual frog-related findings reported this week in the journal Nature.

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<p><a href="http://www.physorg.com/news129734195.html">Female concave-eared frogs draw mates with ultrasonic calls</a></p> <p>Most female frogs don’t call; most lack or have only rudimentary vocal cords. A typical female selects a mate from a chorus of males and then –silently – signals her beau. But the female concave-eared torrent frog, Odorrana tormota, has a more direct method of declaring her interest: She emits a high-pitched chirp that to the human ear sounds like that of a bird. This is one of several unusual frog-related findings reported this week in the journal <i>Nature</i>.</p>