1. Staničná 318/19, 900 66 Vysoká pri Morave, Slovak Republic;
2. Institute of Forest Ecology, Slovak Academy of Science, L'udovíta Štúra 2, 960 53 Zvolen, Slovak Republic;
3. Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava 4, Slovak Republic;
4. Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, Savoyenstraβe la, A-1160 Vienna, Austria;