The NSS Bulletin - ISSN 1090-6924
Volume 42 Number 4: 70-71 - October 1980

A publication of the National Speleological Society

Notes of the Determination of Bat Populations Using Photographic Measurements
Tom Warden


Bat population counts during the 1960's were based upon visual impressions rather than upon counting individuals and were rather inaccurate. Photographic bat population investigation, then a relatively new technique, is based on periodically counting individual bats revealed in photographs and extrapolating that count by means of a mathematical formula.

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