Sprawozdanie z Akcji Zimowego Liczenia Ptaków w Dolinach Rzek na Nizinie Mazowieckiej w styczniu 2014 roku
Journal Title: KULON - Year 2014, Vol 19, Issue
Abstract
During 11-19 January 2014, birds wintering in river valleys and other selected sites of the Mazovian Lowland were counted. The survey was focused on monitoring of the distribution and abundance of birds wintering in Mazovia, with emphasis on waterbirds. In total, 16 rivers were surveyed in different size classes. Also other places of waterbird concentration were observed, that is, largest towns of the region – Warsaw, Radom, Skierniewice, and at dam reservoirs (Zegrzyński, Domaniów, and Siczki). In total, 1102 km of the river course and reservoirs were surveyed . The winter of 2013/2014 was very mild, and mean temperatures of the region varied between 0°C and +5°C. The water level in the Vistula River and its basin was low to medium. The rivers were not frozen. Wintering of 99 bird species was recorded (tabs 1 and 2), represented by almost 80 000 individuals. Among waterbirds, 36 species were discovered (table 1) with a total number of 49 902 individuals. The dominant species was the Mallard Anas platyrhynchos (80.8%), rather abundant birds included the Black-headed Gull Chroicocephalus ridibundus (2.9%), Goosander Mergus merganser (2.7%), Goldeneye Bucephala clangula (2.6%), Cormorant Phalacrocorax carbo (2.3%) and Mute Swan Cygnus olor (1.9%). The most abundant landbird was the Siskin Carduelis spinus (26.5% of the assemblage, density of 72.4 ind./10 km). The group of dominants also comprised the Fieldfare Turdus pilaris (12.3%), Great Tit Parus major (6%), Tree Sparrow Passer montanus (5.2%), Yellowhammer Emberiza citrinella (5.1%), Jackdaw Corvus monedula (5%) and Goldfinch Carduelis carduelis (4.9%).The mean density was 272.8 ind./10 km.
Authors and Affiliations
Marcin Łukaszewicz, Patryk Rowiński
Keywords
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