Bat data : Michigan, Detroit

Abstract

Mist-netting was the survey technique over ultrasound-sensing because netting allowed for the elimination of repeat captures, which was required for statistical independence, and allowed for the determination of age ratios, sex ratios, and reproductive condition. Nets were placed over the rivers, perpendicular to the direction of stream flow, and underneath overhanging branches in order to block as much of the flight corridor as possible.