east of Princeton, at the Eva May Mine northeast of Basin, and at 

 Queen's Gulch in 1992 (Figure 2). There were old mine buildings 

 at most of these sites. All of these sites are also in or near 

 riparian areas, and most have mature Douglas fir or mature 

 hardwoods nearby. 



This species was heard on the bat detector at numerous sites 

 during surveys in 1992. These sites were Bison Creek, Queen's 

 Gulch and Brown's Gulch in the Elkhorns, Pike's Peak Creek, 

 Pigeon Creek, Beaver Creek, Boulder Creek, and along Old Highway 

 10 southeast of Butte. They were also heard at the Mountain Lion 

 Mine and the Douglas Creek Mines southeast of Drummond, and the 

 Eva Mae Mine northeast of Basin. All sites except the Mountain 

 Lion Mine were in riparian areas, and all had mature Douglas fir 

 or mature hardwoods in the area. Extensive rock or rock outcrops 

 were components of six of the 11 sites. Old mine buildings were 

 at two of the sites. 



The Hoary bat {Lasiurus cinereus) was captured in 1991 above Rock 

 Creek Lake northwest of Deerlodge. It was flying low over a 

 slow-moving stream amid dense willows, in a Douglas fir forest. 

 No other Hoary bats were captured on the Deerlodge N.F. during 

 1991 and 1992, though one was captured in similar habitat over 

 Indian Creek on the Helena N.F. on the east flank of the Elkhorn 

 Mountains in 1992. Hoary bats were heard on the bat detector at 

 Stoney Creek Campground near Rock Creek during surveys in 1992. 



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