作者: Anthony D. Fox , Peter Lyngs , Aleksi Lehikoinen , Risto A. Väisänen , Sverre Kobro
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摘要: A. D. Fox, Department of Wildlife Ecology and Biodiversity, National Environmental Research Institute, University Aarhus, Kalo, Grenavej 14, DK-8410 Ronde, Denmark. E-mail: tfo@dmu.dk. (correspondence author) S. Kobro, Bioforsk, Plant Health Protection Division, Hogskoleveien 7, N-1432 As, Norway Lehikoinen, Bird Unit, Biological Sciences, P.O. Box 65 (Viikinkaari 1), FI-00014 Helsinki, Finland P. Lyngs, Christiansos Naturvidenskabelige Feltstation. Christianso 97, DK-3760 pr Gudhjem, Denmark R. Vaisanen, Zoological Museum, Finnish Museum Natural History, 17 (P. Rautatiekatu 13),