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 echolocations ( Fenton 1988, Fenton and Bell 

 1981). Detections were recorded on field forms by time, 

 frequency monitored, and species (if known or suspected )( See 

 Appendix I for field forms ) . 



Bat identification 



Once captured in a mist net or harp trap, bats were carefully 

 removed. Species of the bat, sex, age (juvenile or 

 adult )( Anthony 1988), reproductive condition (females: lactatlng 

 or non-lactating; males: scrotal or non- scrotal ) (Racey 1988), and 

 select measurements (forearm length, tibia length) and other 

 identifying characteristics and measurements such as ear length, 

 pelage coloration, etc., were recorded on field forms. Weight was 

 taken using a Pesola spring scale (1/2 gram) and measurements 

 were taken using a vernier caliper and recorded to the 

 millimeter. Bats were identified using one of several 

 dichotomous keys. The most useful were: 



Bats of America Barbour and Davis 1969 



The Mammals of Montana Hoffman and Pattie 1968 



Handbook of Canadian Mammals van Zyll de Jong 1985 



