Versatility and Stereotypy of Free-Tailed Bat Songs Bohn, Kirsten M. ; Schmidt-French, Barbara ; Schwartz, Christine ; Smotherman, Michael ; Pollak, George D. Abstract Publication: PLoS ONE Pub Date: August 2009 DOI: 10.1371/journal.pone.0006746 Bibcode: 2009PLoSO...4.6746B