Echolocating bats adjust their vocalizations to catch insects against a changing environmental background.
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<i>The Sound of Dinner.</i> Chanut F, PLoS Biology Vol. 4/4/2006, e107 <a rel="nofollow" class="external free" href="https://dx.doi.org/10.1371/journal.pbio.0040107">https://dx.doi.org/10.1371/journal.pbio.0040107</a>