Caves or adits that were potentially used by bats were surveyed 

 by setting up one or more mist nets at or near the opening, or a 

 harp trap within the entrance, shortly before dark, and 

 monitoring the nets throughout the night. Mist nets were 

 collapsed shortly before dawn. An observer also used one or more 

 "bat detectors" at the entrance, beginning at dusk and staying at 

 least an hour, and then until there was no bat activity for more 

 than 30 minutes. 



Habitat Use Surveys 



Once a site was selected, from two to six mist nets were set up 

 in the evening across trails, next to lakeshores, and across 

 streams or ponds. Nets were not raised into final position until 

 about one-half hour after sunset to avoid catching birds. 

 Depending on the site, the height of the bottom of the net above 

 ground or water varied from less than a foot to 6 feet. Nets 

 were checked at least every hour until after mid-night, then 

 again between one hour, and one-half hour before sunrise. Nets 

 were taken down one-half hour before sunrise to avoid catching 

 birds. 



One or two walking transects were conducted at each site, 

 depending upon available personnel. Beginning approximately one- 

 half hour after sunset, and lasting for one hour, a transect was 

 walked through habitat representative of the area, using a bat 

 detector. All bats heard were recorded as "cruising, searching. 



