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In 1997 and 1998, nests of the house martin were counted in the town of Mogielnica and in the neighbouring villages of Miechowice (245 inhabitants) and Pawłowice (128 inhabitants), central Poland. Densities of the house martin in 1997 were 3.7 pairs/10 ha in Mogielnica, 43.0 at Miechowice, and 167.7 at Pawłowice. In Mogielnica, nests were constructed mainly on buildings made for people, whereas in...
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