Szukana fraza: [Abstract = "In order to determine the importance of nest\-boxes for both species on different plots, obtained data were analyzed using Nest\-box Importance Coefficient \(NIC\). This coefficient describes species\-specific rate of occupation of nest\-boxes as well as the contribution of the pairs nesting in them. Tree Sparrow occupied a total of 33% of A\-type nest\-boxes, its densities were positively correlated with the number of nest\-boxes, and seasonal differences in occupation rate were low for this species."]

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