1. School of Biology University of Leeds LS2 9JT Leeds UK
2. Naturalis Biodiversity Center P.O. Box 9517 2300RA Leiden The Netherlands
3. Department of Ecology and Evolutionary Biology Yale University 165 Prospect Street New Haven CT 06520 USA
4. Center for Theoretical Study Charles University and the Academy of Sciences of the Czech Republic Jilska 1 110 00 Praha 1 Czech Republic
5. Working Group Lepidoptera Faunistics, Zoological Museum, Section Entomology Plantage Middenlaan 64 1018 DH Amsterdam The Netherlands
6. Butterfly Conservation Manor Yard East Lulworth Dorset BH20 5QP UK
7. Botanical Society of the British Isles c/o Botany Department British Museum (Nat. Hist.) London UK
8. Centre for Ecosystem Studies Wageningen University and Research Alterra, PO Box 47 NL‐6700 AA Wageningen The Netherlands
9. Research Institute for Nature and Forest (INBO) Kliniekstraat 25 1070 Brussels Belgium
10. Laboratory of Aquatic Ecology and Evolutionary Biology University of Leuven Charles Deberiotstraat 32 B‐3000 Leuven Belgium
11. Laboratoire de Zoologie Université de Mons Place du Parc 23 B‐7000 Mons Belgium
12. FLORON Postbus 1413 6501 BK Nijmegen The Netherlands
13. School of Agriculture Policy and Development University of Reading Reading RG6 6AR UK
14. European Invertebrate Survey–Netherlands/Naturalis Biodiversity Center Postbus 9517 2300 RA Leiden The Netherlands
15. Institute for Water and Wetland Research Radboud University Nijmegen P.O. Box 9010 6500 GL Nijmegen The Netherlands
16. De Vlinderstichting/Dutch Butterfly Conservation P.O. Box 506 6700AM Wageningen The Netherlands
17. Laboratory of Entomology Wageningen University P.O. Box 8031 6700 EH Wageningen The Netherlands
18. University of Amsterdam Institute of Biodiversity and Ecosystem Dynamics P.O. Box 94248 1090 GE Amsterdam The Netherlands