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Infrared bat tracking apparatus
Photo: Patrick Lampe

BatRack is an open-source multi-sensor tool consisting of an audio sensor, a camera unit, and an automatic radio tracking unit.

It is designed to allow automatic observation of bats in the wild and, depending on the configuration, to assign the observations to individuals. Bat calls can be used as a trigger for the camera, enabling reliable recording. VHF can also be used as a trigger for video and audio recordings and additionally allows the recordings to be assigned to individuals equipped with VHF transmitters. The different sensors can to fill in mutual information gaps. For a detailed description of the possible applications and an assessment of the performance of the trigger approach see the corresponding publication.

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