The endangered Indiana bat (Myotis sodalis) has been the focus of much research in the past 40 years, primarily with respect to the summer habitat requirements for the species. Recent advances in radio telemetry have allowed researchers to learn about the specific activity patterns for roosting bats. Torpor is an energetic process that bats use to conserve energy through the day. We used an equation that gives a threshold for when the animal enters torpor to quantify the amount of energy conservation among Indiana bats, northern long-eared bat (M. septentrionalis) and little brown bat (M. lucifugus) and their reproductive stage. Additionally, we used the torpor threshold to determine if researchers were causing disturbances to roosting female Myotis bats in the summer. / Department of Biology