Copying Sounds to Survive

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Many birds are known for their ability to copy sounds. Parrots can human speech, and the lyrebird of Australia has been recorded copying car alarms and camera shutters. For a long time, scientists assumed that such mimicry was mainly a way for males to ( 1 ). Females of many prefer partners that can produce a wide variety of songs, and copying the calls of other is an easy way to that variety. Recent research, however, suggests that mimicry can serve other purposes as well. In southern Africa, a bird called the fork-tailed drongo copies the alarm calls of other animals, such as meerkats. When the meerkats hear what sounds like a warning, they run for cover and their food behind, which the drongo then steals. Interestingly, if the meerkats begin to ignore a particular call, the drongo switches to imitating a different . This suggests that ( 2 ). Mimicry may also help some birds protect their young. Certain small birds that inside holes in trees produce a loud hissing sound when a looks into the . To the , the sound may resemble that of a snake hiding in the dark. ( 3 ), predators often without attacking. Findings like these show that copying sounds is not simply a form of display but a tool for .

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