If you spend a lot of time with certain frogs, you’ll probably notice a behavior called toe-tapping: a rapid up-and-down movement of the middle toes of the hind legs. People have known about ...

A fringe-lipped bat, Trachops cirrhosus, responds to the calls of the túngara frog, Engystomops pustulosus, one of its preferred prey species. First, the bat hears the call of a single male túngara ...