Science Focus
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In the dead of night, when it's dark enough that you or I might not be able to see our hands in front of our faces, some bats have no trouble tracking down a small, flitting insect and making a meal of it. Their secret? A biological sonar called echolocation.
By pushing air through their larynxes and out of their mouths or noses, echolocating bats generate ultrasonic "chirps." The echoes that bounce back to their ears give the bats the lay of the land and the sky, revealing obstacles and prey.
Bats that hunt like this are usually classified in one of two groups. There are the "gleaners" that...
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» see original post http://theweek.com/article/index/264297/meet-the-mariah-carey-of-bats
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