Butrte area. Though habitats throughout the Forest were to be 

 sampled, the highest priority was assigned to the 

 Phillipsburg/Anaoonda zone due to the higher number of caves and 

 adits occurring within it, and the greater variety of habitats. 



Caves and adits were located by consultation with Forest Service 

 personnel, knowledgeable "cavers," "locals," and existing literature, 

 particularly Campbell ' s ( 1978 ) Caves of Montana. 



Other survey sites were chosen using the afore-mentioned criteria. 

 Once a general area was selected, the specific site was chosen that 

 appeared to have potential roosting sites nearby, such as older 

 trees, fractured rock, old buildings, or known caves or adits. If 

 water was nearby, specific sites to set up mist nets were generally 

 selected that crossed the slowest moving stretches of streams or 

 pools. 



Caves and Adits 



When a cave or adit was located, it was searched for evidence of bat 

 use (bats, droppings, characteristic odor) and the location, extent, 

 potential for bat use, temperature, humidity, and other pertinent 

 data were described on field forms. 



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 



