1991. As noted in the Results secticn, of 30 hours of transects run 

 during 1991, only 10% recorded more than 21 bats per hour, and about 

 85% had less than 10 bats per hour. In other localities 10 or even 60 

 bat passes per hour may be ccMTsidered low activity, but these 

 categories will serve for the analysis of relative habitat use on the 

 Deerlodge. 



Assuming that the degree of bat activity associated with a site 

 cxDrrelates with the preference by bats for some ccnpcxient of the 

 habitat of that site, analysis of bat activity by habitat component 

 should indicate which conponents bats appear to be selecting for, or 

 against. For instance, 60 percent of the sites surveyed in which 

 beaver ponds were a conponent of the habitat had high bat activity, 

 while another 20% had moderate activity (Table 2). Of sites with 

 mature Douglas fir, 33% had high activity and 17% moderate activity. 

 ^Jo sites with lakes or clearcuts had high activity, but 100% of those 

 sites with clearcuts had moderate activity and 67% of the sites with 

 lakes had moderate activity. Conbining features, 63% of those sites 

 surveyed that had both nearby rock outcrops and riparian areas had 

 high or moderate activity, and 46% of the sites with riparian areas 

 and either Douglas fir or mature hardwoods had high or moderate 

 activity (Table 2). 



The habitat oomponents at v^iich a third or more of the sites 

 featuring that component had high bat activity were: beaver ponds 

 (60%), rock outcrops (45%), mature hardwoods (38%), and mature 



27 



