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Article

Abstract

Many species of birds have been observed to develop higher-pitched calls in urban environments; however local Blue Jays are unstudied (Mockford and Marshall, 2009). The urban environment's high noise pollution imposes a significant fitness challenge; then, the urban Jay calls will be different (higher) than rural Jay(Parris and Schneider, 2009). A series of recordings were taken in rural and urban environments; it was clear that there is a significant increase in maximum and minimum kHz in urban jays than rural jays. These results suggest that blue jays alter their calls to accommodate the environmental factors in urban settings similar to the ways tropics and great tit papers suggest.

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