METHODS 

 Equipment 



Mist nets: Braided nylon mist nets, in 18, 30, and 36 

 foot lengths, (50 dernier/2 ply; 1 1/2 inch mesh) were used 

 to capture bats ( Kunz and Kurta 1988). Mist nets were 

 strung on sectional aluminum poles made from electrical 

 conduit, cut to 5 foot lengths, each with a connector at one 

 end, so a net pole could be fashioned to any desired height. 

 Poles used for this study were two or three lengths high ( 10 

 to 15 feet). Poles were held in place with ropes tied to 

 trees, rocks, or branches. Mist nets were deployed across 

 the narrower stretches of slow moving streams and smaller 

 pools, where bats were likely to come for water (Kunz and 

 Kurta 1988). 



Bat detectors: Tunable broadband ultra-sonic bat 

 detectors ( QMC Mini-2) were used to detect night-time bat 

 activity. If a single detector was being used it was tuned 

 to 40 kHz when walking a transect. If two detectors were 

 available, one was tuned to 40 kHz and the other to 25 kHz. 

 When a bat was detected, the dial of the detector could be 

 manipulated to find the high and low range of the detected 

 bat (if there was time, which there generally was not). With 

 experience the activity of the bat (cruising, searching, or 

 feeding) and the genus of the bat could be determined by the 

 sound, duration, and intensity of the detected bat 



