Contents

11 May 2007
Vol 316, Issue 5826

About The Cover

Cover image expansion

COVER A bat, Glossophaga soricina, in flight within a wind tunnel. The air velocity field induced by the wingbeat is shown by superimposed arrows and to scale. The reconstructions of the wake produced by bat flight, reported on page 894 have features that are not observed in the wakes of similarly sized birds. Image: L. C. Johansson, M. Wolf, and A. Hedenström