Search for: [Abstract = "House\- and Tree Sparrows were censused on 55 plots \(684 ha\), representing 3 habitats\: housing estates, parks and allotment gardens in Warsaw from 2005\-2009 and in 2012. Also, the data on nest sites of both species were gathered. Data from 70s\/80s of the other authors enabled to determine the changes in number of sparrows. The population of House Sparrow decreased on average by 48% and the sharpest decline was found in allotment gardens. The decline continued in the period of studies, i.e. in 2005\-2012."]

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