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W okresie od kwietnia do lipca 2004 roku przeprowadzono badania nad liczebnością i rozmieszczeniem ptaków gniazdujących w zachodniej części dzielnicy Śródmieście we Wrocławiu (c. 850 ha). W badaniach zastosowano uproszczoną wersję metody kartograficznej. Wykazano łącznie 43 gatunki ptaków lęgowych i 4 gatunki prawdopodobnie lęgowe. Do eudominantów należały gołębie miejskie, wróble i jerzyki. Wśród...
In the 1988/1989 and 1989/1990 seasons, the winter grouping of corvids in the city of Wrocław (Lower Silesia, Poland) included 200,000-250,000 individuals, of which 92-94% were Rooks, 6-8% Jackdaws Corvus monedula and about 0.1% Hooded Crows Corvus corone cornix. Young Rooks made up 5-6% of the population. Numbers were estimated by counting flocks during their flights to the roosts. Rooks wintering...
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