1. Estación Biológica de Doñana - CSIC; ES-41092 Seville Spain
2. School of Forestry and Environmental Studies, Yale Univ.; New Haven CT 06511 USA
3. Dept of Zoology; Univ. of British Columbia; Vancouver BC V6T 1Z4 Canada
4. Dept of Biology; Univ. of Florida, 111Bartram Hall; Gainesville FL 32611-8525 USA
5. Dept of Biological Sciences; Marine Sciences Program, Florida International Univ.; 3000 NE 151st St North Miami FL 33181 USA
6. School of Environmental and Forest Sciences, Box 352100, Univ. of Washington; Seattle WA 98195 USA
7. Dept of Forest Ecosystems and Society; Oregon State Univ.; Corvallis OR 97331 USA
8. School of Life and Environmental Sciences, Deakin Univ.; 3121 Australia
9. H.T. Harvey and Associates; Los Gatos CA 95032 USA
10. Dept of Population Ecology; Inst. for Mediterranean Studies (IMEDEA), CSIC-UIB; ES-07190 Esporles Spain
11. Wildlife Inst. of India, Chandrabani; Post Box 18 Uttarakhand 248001 India
12. Dept of Biology; Univ. of Turku; FI-20014 Turku Finland