Ornis Polonica 2021, 62: 169–188
Reproductive ecology and abundance of the Caspian Gull Larus cachinnans at Mietków Reservoir in 2019–2020
Marcin Przymencki, Klaudia Litwiniak, Magdalena Zagalska-Neubauer, Grzegorz Neubauer
Ornis Polonica 2021, 62: 189–209
Species composition and number of birds observed in arable fields of the Lublin region
Marcin Polak
Ornis Polonica 2021, 62: 210–242
Rare Birds Panel in Poland – report of 2019 for non-breeding species
Szymon Beuch, Tomasz Chodkiewicz, Łukasz Ławicki, Przemysław Wylegała, Robert Cymbała, Paweł Czechowski, Stanisław Czyż, Piotr Dębowski, Andrzej Dylik, Grzegorz Grygoruk, Wojciech Guzik, Krzysztof Jankowski, Zbigniew Kajzer, Łukasz Matyjasiak, Bartosz Smyk, Marcin Wężyk, Arkadiusz Sikora
Ornis Polonica 2021, 62: 243–249
The first records of roof-top nesting by Caspian Gulls Larus cachinnans in Poland with reference to other cases in Europe
Jan Rapczyński, Klaudia Litwiniak, Marcin Przymencki
Ornis Polonica 2021, 62: 249–256
Abundance of the European Nightjar Caprimulgus europaeus in the Masovian Landscape Park
Ignacy Gołębiewski
Ornis Polonica 2021, 62: 256–258
The Spur-winged Lapwing Vanellus spinosus on the national bird list
Tadeusz Stawarczyk, Marcin Faber
