1. Institute of Zoology; Zoological Society of London; London NW1 4RY UK
2. Centre for Biodiversity and Environment Research; University College London; London WC1E 6BT UK
3. Royal Veterinary College; London NW1 0TU UK
4. Genetics and Ecology of Amphibian Research Group; Laurentian University; Sudbury ON P3E 2C6 Canada
5. Department of Ecology and Evolution; Stony Brook University; New York 11794 USA
6. NatureServe; Arlington VA 22203 USA
7. Institute for Wildlife Studies; Arcata CA 95521 USA
8. Estación de Biología Chamela, Instituto de Biología; Universidad Nacional Autónoma de México; San Patricio 48980 Mexico
9. ARC Centre of Excellence for Environmental Decisions; School of BioSciences; University of Melbourne; Melbourne Vic. 3010 Australia