1. Department of Ecology and Genetics, P.O. Box 3000, 90014 University of Oulu, Finland
2. Department of Biological and Environmental Sciences, University of Gothenburg, Box 463, Gothenburg, 405 30, Sweden
3. Breievege 201, 3570 Ål, Norway
4. Rannevägen 12, Varberg, 432 95, Sweden
5. Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
6. Ljungvägen 3, Väröbacka, 430 22, Sweden
7. University Museum of Bergen, Dept. of Natural History, University of Bergen, PO Box 7800, N-5020 Bergen, Norway
8. Environmental Agency, Valtakatu 11, 28100 Pori, Finland
9. Centre for Environmental and Climate Research (CEC), Ekologihuset, Sölvegatan 37, Lund, Sweden
10. Department of Animal Ecology, Lund University, Lund, Sweden
11. Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, Tartu 51014, Estonia
12. Biology Department, FI-20014 Turku University, Finland
13. FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa
14. Amphi Consult, V. Vedsted Byvej 32, Vester Vedsted, DK-6760 Ribe, Denmark
15. Zoological Museum, Lomonosov Moscow State University, Bolshaya Nikitskaya Str. 6, Moscow 125009, Russia
16. PO Box 82227, Fairbanks, Alaska 99708, USA