Szukana fraza: [Abstract = "The NIC and the rate of nest\-box occupation for Tree Sparrow decreased along an urbanization gradient. House Sparrow used nest\-boxes very rarely, only in older parks and some housing estates. Total rate of nest\-box occupation for House Sparrow in studied plots was 4%, and NIC was relatively low. However, locally, installation of nest\-boxes limited House Sparrow decline caused by reduced availability of its typical nest sites. Both species used only A\-type nest boxes."]

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