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Three species of cavity nesters potentially competitive with the Starling — the Great Spotted Woodpecker Dendrocopos major, Middle Spotted Woodpecker D. medius and Nuthatch Sitta europaea were studied in the years 1997-1999. The number of suitable nest sites for Starlings and competitive pressure were manipulated by increasing or decreasing the availability of nest boxes. Increased nest-site competition...
Magpie nest sites in the Polish urban environment were described from data gatheredon 1838 nests. Tree rows, hedges, and groups of trees and bushes were more frequently used as nest sites (58%). Poplar (Populus spp.) was the most commonly used species for magpie nest sites (31%). Other tree species were Tilia sp. and Betula sp. Most nests were located between 14-20m with mean value 14.98m (SD = 5...
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