Andrew Parker is currently at the Australian Museum, Sydney. In July he will be taking a Lecturer's position at the School of Animal and Microbial Sciences, University of Reading, Whiteknights, PO Box 228, Reading RG6 6AJ, UK. His research interests include the biology, evolution, physics and biomimetics of animal optical structures. Internet: arparker@laurel.ocs.mq.edu.au.