Volume 272 Number 1565/April 22, 2005 of Proceedings: Biological Sciences is now available on the The Royal Society web site at http://www.journals.royalsoc.ac.uk.
This issue contains the following bioacoustic papers
Biosonar behaviour of free-ranging porpoises p. 797 Tomonari Akamatsu, Ding Wang, Kexiong Wang, Yasuhiko Naito
Flexibility in assessment of prey cues: frog-eating bats and frog calls p. 841
Rachel A. Page, Michael J. Ryan
