20 June 2014
Vol 344, Issue 6190

About The Cover

Cover image expansion

COVER A greater sac-winged bat (Saccopteryx bilineata) in flight, with sonograms of a male's territorial song below. S. bilineata is one of 20 bat species known to sing, producing calls that are as varied and structurally complex as bird song. See page 1334.
Images: (bat) © Bruce D. Taubert/Bat Conservation International; (sound waves) Mirjam Knörnschild/University of Ulm