Birds make sounds to communicate, whether to find a potential mate, ward off predators, or just sing for pleasure. But the conditions that contribute to the immense diversity of the sounds they make ...
Scientists trained three carrion crows to produce one, two, three or four vocalizations based on various visual or auditory cues. pete beard via Flickr under CC BY 2.0 DEED Carrion crows, European ...
The phenomenon behind this behavior of birds turns out to be considerably more complex than it seems at first glance ...
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