Search for: [Abstract = "Tree Sparrow showed an increase from 70s\/80s by 68% although in 2005\-2012 the population was stable or even decreased. House Sparrows nested mainly in crevices in buildings, and suboptimal nest sites \- such as nest\-boxes and holes in trees \- were occupied only in these areas where food condition were particularly good. Resources of optima nest sites on studied area was almost entirely sufficient for House Sparrows population."]

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