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The breeding bird community of a 315 ha intensively used farmland in western Poland, consisting of arable fields and small part (ca. 5%) of margin habitats, was censused yearly from 1987 through 1997 by territory mapping. Its size was on average 318+-65 (SD) territories, belonging to 47+-4 species. Of the 71 stationary species, only 23 have been yearly present. Alauda arvensis, Motacilla flava, Emberiza...
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