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Bat Use of Highway Bridges in South-Central Montana.
| 题名： | Bat Use of Highway Bridges in South-Central Montana. |
| 作者： | Hendricks-P.; Lenard-S.; Currier-C.; Johnson-J. |
| 关键词： | *Bats-; *Bridge-use.;Roosts-; Montana-; Landscape-; Structure-materials; Structure-design; Data-analysis; Mitigation-; Protection-; Field-methods; Figures-; Tables-Data; Maternity-colonies. |
| 摘要： | The authors studied use of highway structures by bats in the Billings, Montana area during 2003 and 2004. They found evidence of bat use at 78 of 130 highway structures examined during summer 2003 in Carbon, Stillwater, and Yellowstone counties; 66 structures were used apparently exclusively for night roosting, and 12 bridges were day roosts. Use of highway structures was widespread throughout the study area and among the state highway system categories (Interstate: 73.2%, Primary: 47.2%, Secondary: 57.1%, Local/State Maintained: 60.0%). Day roosts were found in all highway system categories, but relatively more were in the Local/State Maintained category; maternity colonies were in all but the Interstate category. |
| 报告类型： | 科技报告 |
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