On the use of ultrasonic detectors for bat species identification and the calibration of QMC Mini Bat Detectors

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Abstract
Several ultrasonic detection and analysis systems are currently used to provide information on the echolocation calls of bats, in many cases permitting species-level identification. This note briefly describes these systems and alerts potential users of the inaccuracies of the simplest device, the superheterodyne QMC Mini Bat Detector. Without adequate calibration, the error in this latter detector is such that reliable identification of bats by echolocation call characteristics cannot be achieved.

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