entered during surveys, but there was high bat activity in the 

 area. They are probably being used as a sununer roosting site for 

 male Big brown bats and Small-footed myotis. 



SUMMARY 



During 1991 and 1992, eight species of bats, representing four 

 genera, were documented by capture during this phase of the 

 study. These were the Big brown bat {Eptesicus fuscus), the 

 Little brown bat (Myotis luclfugus) , the Yuma bat (Myotis 

 yumanensis) , the Northern long-eared myotis (Myotis evotis) , the 

 Small-footed myotis (Myotis ciliolabrum) , the Fringed myotis 

 (Myotis thysajiodes ) , the Hoary bat (Lasiurus cinereus) , and the 

 Silver-haired bat (Lasionycteris noctivagans) . The Fringed 

 myotis is on the Montana Natural Heritage Program's list of 

 species of special concern (Center 1993). 



Another species of special concern that was possibly observed on 

 the Deer lodge National Forest, but was not positively identified, 

 was the Townsend ' s big-eared bat (Plecotus townsendii) . Several 

 were possibly observed in the vicinity of the Crater on Pike's 

 Peak Creek late in the summer of 1992. 



Relative bat densities varied between habitats. Those with rock- 

 outcrops, beaver ponds, mature hardwoods, mature Douglas fir, or 

 riparian areas nearby had the greatest bat activity during both 

 years of the study. 



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