Institution: | (1) Department of Biology and Parasitology, Karol Marcinkowski University of Medical Sciences, Fredry 10, 61-701 Pozna, Poland;(2) Polish Society for the Protection of Birds, Group of South Wielkopolska, Wrocawska 60A/7, 63-400 Ostrów Wielkopolski, Poland;(3) Institute of Biotechnology and Environmental Protection, University of Zielona Góra, Monte Cassino 21b, 65-561 Zielona Góra, Poland;(4) Department of Avian Biology and Ecology, Adam Mickiewicz University, Umultowska 89, 61-614 Pozna, Poland |