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2013 | 61 | 3 |

Tytuł artykułu

Feeding strategy of wintering rooks Corvus frugilegus L. in urban habitats

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Rooks show a growing tendency to winter in cities. The aim of this study was to determine the influence of meteorological factors on the selection of feeding habitats and to discuss the diversity of feeding strategies in urban environments of different sizes and housing densities. The study was carried out in two cities in south-western Poland, Wrocław and Brzeg (populations of 636,000 and 39,000, respectively), in the years 2004–2008. Nineteen research areas differing in housing density were controlled once a week. In multiple regression, the number of rooks feeding in urban environments showed a correlation with air temperature and the thickness of snow cover. The densities of feeding rooks were higher in urban environments than in agrocenoses. They were also higher in Wrocław than in Brzeg, and in built-up areas than in undeveloped ones. Feeding groups were smaller in Brzeg than in Wrocław. They were also smaller in built-up areas in Brzeg than in undeveloped ones. More rooks fed individually in Brzeg than in Wrocław. The diversity in the frequency of individually feeding rooks in built-up and undeveloped environments was specific to each city. Rooks feeding in Brzeg were more active in searching for food than those in Wrocław, and birds feeding on optimum, undeveloped feeding grounds were more active than those in built-up areas . In both cities, rooks were fed by humans, mainly in built-up areas.

Wydawca

-

Rocznik

Tom

61

Numer

3

Opis fizyczny

p.587-596,ref.

Twórcy

autor
  • Institute of Environmental Protection Engineering, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
  • Department of Climatology and Atmospheric Protection, University of Wroclaw, Kosiby 6/8, 51-670 Wroclaw, Poland

Bibliografia

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Typ dokumentu

Bibliografia

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