Why do shrews twitter?

Shrews, along with scurrying, spend a great deal of time twittering. German scientists Bjorn M. Siemers, Grit Schauermann, HendrikTurni and Sophie von Marten tried to figure out why. For that they developed an artificial shrew: Shrews are very vocal animals. We tested behaviourally whether the high-pitched laryngeal ‘twittering’ calls of as-yet unclear function serve for […]