Mine survey results . • 



TVo adits investigated during this study receive occasional use as 

 a night roost (Table 6) . The Trout Creek adits, located on the 

 west side of Trout Creek at approximately 3800' and 4100' 

 elevation, were visited by Myotis evotis on 13 July. Two bats 

 were observed at the lower adit, one of which was a captured 

 female. A male M. evotis was captured at the upper adit. 

 Subsequent netting on 21 August did not capture bats at these 

 adits, although heavy rain may have affected bat activity on that 

 night. The lower adit contained some bat guano and culled moth 

 wings to further indicate use as a night roost. 



Other adits investigated are likely not used by bats. No sign of 

 bat guano or culled insect parts were noted, and mist-nettmg at 

 the Dry Fork adit and the Bonanza adit did not capture bats. Only 

 a cursory examination was made of the Dixie Creek adit and the 

 Jack Waite mine shaft along the Beaver Creek drainage. The Jack 

 Waite mine entrance is largely blocked off, and no evidence of bat 

 use was noted around the mine structure. The Dixie Creek adit was 

 not fully surveyed due to safety concerns. The entrance section 

 of the adit is very wet and may be unsuitable for bats. 



Table 6.-- Results of mine surveys on the Kootenai National 

 Forest and Lolo National Forest, 1993. 



f^t Lccaticxi 



Bonanza Adit t24N R30W sec 3 



Canoe Gulch Adit T30N R29w sec 7 



Dry Fork Trail Adit T17N R12E sec 27 



Trout Creek Adit (upper) T15N r12e sec 24 



Trout Creek Adit (lower) T15N R12E sec 24 



Dixie Creek Adit T22N R32w sec 17 



Jack Waite Mine T22N R32W sec 17 



Bat reproduction 



Only three juvenile bats were captured during the study - two male 

 M. lucifugus at Lower Fortine Creek on 29 August, and one female 

 M \rolans at Rock Creek on 27 September. Juvenile bats 

 represented 2 percent of the total capture. Females comprised 62 

 of 120 adults captured in mist nets {52 percent) . Lactatmg 

 females were captured at several locations (Table 7), representing 

 7 percent of the total bats captured, and 13 percent of adult 



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