1. Institute of Zoology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria
2. Zoological Museum, M.V. Lomonosov Moscow State University, Bolshaya Nikitskaya Str. 6, 125009 Moscow
3. Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, U
4. University Museum of Bergen, Department of Natural History, University of Bergen, P.O. Box 7800, N-5
5. Belarus Bird Ringing Centre, National Academy of Sciences, Academichnaya Str. 27, 220072 Minsk, Bela
6. Swedish Board of Agriculture, 551 82 Jönköping, Sweden
7. Centre for Environmental and Climate Research, Lund University, Sölvegatan 37, 223 62 Lund, Sweden
8. South Iceland Research Centre, University of Iceland, Lindarbraut 4, 840 Laugarvatn, Iceland
9. Department of Biological and Environ mental Sciences, University of Gothenburg, Box 463, 405 30 Goth