Affiliation: | 1.Institute of Zoology, Poznań University of Life Sciences, Wojska Polskiego 71c, 60-625, Poznań, Poland ;2.Department of Avian Biology and Ecology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland ;3.Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035, Kórnik, Poland ; |