Sprawozdanie z zimowego monitoringu ptaków na obiektach wodnych Niziny Mazowieckiej w styczniu 2017 roku
Journal Title: KULON - Year 2017, Vol 22, Issue
Abstract
In the second decade of January 2017, the counts of birds wintering in the river valleys and on other water bodies of the Mazovian Lowland were carried out. A single control was conducted on 14-15 January (acceptable range from 14 to 22 January). The aim of this action was to monitor the distribution and changes in the number of bird populations wintering on selected rivers and water bodies of Mazovia. 17 rivers representing different size categories were controlled. The observations were also carried out on urban water bodies of Warsaw, Radom and Skierniewice, and on the dam reservoirs (Zegrzyński and Domaniów reservoirs). In total, 1180 km of the length of the rivers were controlled. We reported wintering of 106 bird species (Tables 1 and 2), which total number reached nearly 105.5 thousands of individuals, and that was the highest number recorded during last 6 years ( x =77.1 thousands). Among wetland and water bird species, the occurrence of 38 species was documented (Table 1) and their total number was 58 933 indiv. The most abundant was the Mallard Anas platyrhynchos – 76%, co-dominant species was the Common Goldeneye Bucephala clangula (5.1%). The following species were also quite numerous: Black-headed Gull Chroicocephalus ridibundus (3.6%), Goosander Mergus merganser (3.2%), large unidentified gulls Larus spp. (2.7%), Mute Swan Cygnus olor (2.6%) and Great Cormorant (Phalacrocorax carbo (2.4%). Average density of all wetland and waterbirds on the rivers in the eastern part of the region was 268.9 indiv./10 km, in the western part 307.6 indiv./10 km, while it was the highest on the Vistula River – 534 indiv./10 km, similarly as in 2016. We also observed 68 species representing “land” birds (Table 2.), which total number was 46 509 indiv., and that was much higher than average number of birds recorded during last six seasons ( x =28.1 thousands). The dominant species were: Eurasian Siskin Spinus spinus (25.9%), Fieldfare Turdus pilaris (18.1%), Western Jackdaw Corvus monedula (5.8%), Great Tit Parus major (5.8%) and Yellowhammer Emberiza citrinella (5.2%). Average density of these birds was 394.1 indiv./10 km of the river length and was the highest since 2011 ( x =251 indiv./10 km; range: 168.3 – 376.6 indiv./10 km in 2015). We reported wintering of 8 species representing Accipitriformes and Falconiformes (Table 2), which accounted for 1.4% of the total number of the studied bird community. The Common Buzzard Buteo buteo was clearly dominant (52.5% in the group of birds of prey), followed by the White -tailed Eagle Haliaeetus albicilla (15.2%) and Rough-legged Buzzard Buteo lagopus (14%). In total, 98 people took part in winter counts in January 2017.
Authors and Affiliations
Marcin Łukaszewicz, Patryk Rowiński
Keywords
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