Szukana fraza: [Abstract = "The rookeries were mostly situated on deciduous trees \(82.5%\). Colonies in coniferous stands were significantly larger than those in the deciduous tree stands. 98.1% of all rookeries were located in the vicinity of human settlements. Colonies were characterized by unstable numbers of nests \(years 2012\-2014 vs 2013\-2015\). However, an analysis of population fluctuations in 75 colonies \(about 8,000 nests\) showed no directional trend, i.e. a decrease in number of nests in one location was compensated by an increase in another one."]

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