Authors
Esko Rajala
Länsirannantie 297, Mäyry, Finland
Ülo Väli
Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
Oskars Keišs
Institute of Biology, University of Latvia, Riga, Latvia
Vytautas Jusys
Ventės Ragas Ornithological Station, Lithuania
Zbigniew Kwieciński
Department of Ecology and Anthropology, Institute of Biology, University of Szczecin, Department of Avian Biology and Ecology, Faculty of Biology, Adam Mickiewicz University, Szczecin
Valery Dombrovski
Laboratory of Molecular Zoology, National Academy of Sciences of Belarus, Minsk, Belarus
Thorsten Krüger
Oldenburg, Germany
Jan Hušek
National Museum of the Czech Republic, Praha, Czech Republic
Samuel Pačenovský
State Nature Conservancy of Slovakia, Bratislava, Slovakia
Yuriy Kuzmenko
Schmalhausen Institute of Zoology, NAS of Ukraine, Kyiv, Ukraine
Tatiana Kuzmenko
Swiss Ornithological Institute, Sempach, Switzerland