Effects of Orientation and Weatherproofing on the Detection of Bat Echolocation Calls

  • Authors: Britzke, E.; Slack, B.; Armstrong, M; Loeb, S.
  • Publication Year: 2010
  • Publication Series: Scientific Journal (JRNL)
  • Source: Journal of Fish and Wildlife Management 1(2):136–141


Ultrasonic detectors are powerful tools for the study of bat ecology. Many options are available for deploying acoustic detectors including various weatherproofing designs and microphone orientations, but the impacts of these options on the quantity and quality of the bat calls that are recorded are unknown. We compared the impacts of three microphone orientations (horizontal, 45u, and vertical) and two weatherproofing designs (polyvinyl chloride tubes and the BatHat) on the number of calls detected, call quality, and species detected by the Anabat II bat detector system at 17 sites in central Kentucky in May and June 2008. Detectors with BatHat weatherproofing recorded significantly fewer call sequences, pulses per file, species per site, and lower quality calls. Detectors in the horizontal position also tended to record fewer files, fewer species, and lower quality calls. These results illustrate potential impacts of deployment method on quality and quantity of data obtained. Because weatherproofing and orientation impacted the quality and quantity of data recorded, comparison of results using different methodologies should be made with caution.

  • Citation: Britzke,E.; Slack, B.; Armstrong, M; Loeb, S. 2010. Effects of Orientation and Weatherproofing on the Detection of Bat Echolocation Calls. Journal of Fish and Wildlife Management 1(2):136–141.
  • Keywords: activity, Anabat, bats, orientation, weatherproofing
  • Posted Date: March 16, 2011
  • Modified Date: March 30, 2011
  • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.