Ornis Polonica 2011, 52: 161–168
Woodpeckers abundance in the Białowieża Forest – a comparison between deciduous, strictly protected and managed stands
Wiesław Walankiewicz, Dorota Czeszczewik, Tomasz Tumiel, Tomasz Stański
Ornis Polonica 2011, 52: 169–180
Numbers and dynamics of spring migration of geese in the Biebrza Basin
Michał Polakowski, Monika Broniszewska, Łukasz Jankowiak, Łukasz Ławicki, Marcin Siuchno
Ornis Polonica 2011, 52: 181–195
Numbers and distribution of Lapwing Vanellus vanellus and Golden Plover Pluvialis apricaria in Poland in autumn 2008
Włodzimierz Meissner, Arkadiusz Sikora, Jacek Antczak, Sebastian Guentzel
Ornis Polonica 2011, 52: 196–210
Numbers and distribution of Bewick’s Swan Cygnus columbianus bewickii in Poland in spring 2010
Łukasz Ławicki, Przemysław Wylegała, Maria Wieloch, Arkadiusz Sikora, Grzegorz Grygoruk, Andrzej Dombrowski, Sławomir Chmielewski, Wiesław Lenkiewicz, Radosław Włodarczyk
Ornis Polonica 2011, 52: 211–218
Mate choice strategies and inbreeding avoidance in birds
Aneta Arct
Ornis Polonica 2011, 52: 219–224
The use of aerial photographs to detect breeding sites of the Mute Swan Cygnus olor in Gdańsk
Arkadiusz Sikora
Ornis Polonica 2011, 52: 225–228
Avifaunistic Commission Communiqué No 15. Cases of breaking verification rules
Komisja Faunistyczna
Ornis Polonica 2011, 52: 229–230
Mystery bird 64: Tree Sparrow Passer montanus
Jan Lontkowski
