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Terminal Phase Feeding Call of the Hawaiian Hoary Bat

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Title: Terminal Phase Feeding Call of the Hawaiian Hoary Bat


When bats detect an insect from returned echolocation calls they rapidly increase the pulse rate and raise the frequency of calls in order to gather more information on the insect including location. These calls emitted right before a bat closes in on an insect are called terminal phase calls or "feeding buzzes". The frequency is well above human hearing capabilities at 65 khz and bats will emit some 200 calls per second.

Location: HI, Pearl Harbor, Ford Island, Oahu,, USA

Date Recorded: 9/21/2012

Audio Producer: Christopher Todd , Wildlife Acoustics

Usage: This audio file is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit this audio.

Audio Credits:

Recorded by an automated SM2BAT ultrasonic detector (Wildlife Acoustics is the manufacturer). The units were deployed by Kristina Montoya, USGS, PIERC

The audio was converted by Christopher Todd, contract worker to USGS via Hawaii Cooperative Studies Unit, University of Hawaii at Hilo

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Tags: Hoary bat endangered



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