주야간 휴식장소로써 박쥐가 교량(Bridge)을 이용하는 특성을 파악하기 위하여 2007년 7월부터 2008년 10월까지 경상북도 남동부 지역의 수계에 조성된 81개 교량을 조사하였다. 조사결과 교량을 휴식장소로 이용하고 있는 종은 관박쥐 Rhinolophus ferrumequinum, 집박쥐 Pipistrellus abramus, 검은집박쥐 Hypsu해 alaschanicus, 우수리박쥐 Myotis petax, 쇠큰수염박쥐 Myotis ikonnikov, 문둥이박쥐 Eptesicus seotinus 등 6종이 확인되었다. 총 7개 유형의 교량 가운데 거더(girder)가 조성되어 있는 3개 유형의 교량에서만 박쥐의 이용이 확인되어 교량에 있어 박쥐의 휴식장소 이용은 교량의 구조적 특징에 의해서 영향을 받는 것으로 나타났다. 구조적 특징을 제외한 환경요인으로는 교량의 주변 산림, 경작지, 교량 하부의 차량통행 여부 등의 요인이 박쥐의 교량내 휴식활동에 영향을 미치는 것으로 확인되었다.

Between July and October 2011, radio-tracking was used to analyze the characteristics of home ranges and day roosts of Myotis aurascens by using 3 individuals (male: 2, female: 1). Bat capturing was conducted at a bridge and a nearby forest in Ulju-gun, Ulsan-si. We attached radio transmitters (0.32 g) to the bats and monitored them by using a radio receiver with a Yagi antenna. Home-range analysis of M. aurascens by using 100% minimum convex polygon (MCP) and 95% MCP showed an average of 106.5 ha and 89.3 ha, respectively, and 50% kernel home range (KHR) showed an average of 8.4 ha. Home range overlap of the 3 bats was observed at the bridge and at nearby water bodies as the core areas, and the size of the home range overlap was 7.3 ha by 100% MCP, 5.9 ha by 95% MCP, and 1.6 ha by 50% KHR. The home range for each bat consisted of the main foraging sites, and the types of foraging sites were similar. M. aurascens-01(M-01) used the bridge and nearby water bodies as the nightly main core areas, M. aurascens-02(M-02) used rice fields and water bodies adjacent to the forest as core areas, and M. aurascens-03(M-03) used water bodies and resident areas as core areas. Although rice fields and resident sites represented the core areas of the home ranges of M-02 and M-03, habitat use was the highest near water bodies as the core area for all the 3 bats. The types of day roosts in this study were a wooden house, canopies of a broad-leaved woodland, and banks of rice fields. The roosts in the wooden house and canopies of the broad-leaved woodland were located within the forest, and the roost in the banks of rice fields was also adjacent to the forest. Our results revealed that the main home range and foraging sites of M. aurascens were located near water bodies as the core area, and forests and places adjacent to the forests were used as day roosts.