Jankowiak, Lukasz, Marcin Antczak, Zbigniew Kwieciñski, Pawel Szymañski, Marcin Tobolka, and Piotr Tryjanowski. 2015. “Diurnal Raptor Community Wintering in an Extensively Used Farmland”. Ornis Fennica 92 (2):76–86. https://doi.org/10.51812/of.133870.