At 05:57 PM 1/26/2004, you wrote:
>Somewhere in the archives there is a recording of the echo location sound=
>used by a bat in persuit of prey. The repitation rate increases as the bat=
>closes on the prey. The recording has been modified to bring the sound
>with in human hearing.
>
>Do bats have other frequency calls for bat to bat communication or is the=
>echo location frequency specific to the species? Perhaps the size and
>shape of the resinator in the bat's head sets the frequency. If so, then
>communication might be by pulse rate variation.
Bats also communicate in human-audible ranges. Hear some examples at
http://www.naturesongs.com/otheranimals.html#mftb
Doug
Doug Von Gausig
Clarkdale, Arizona, USA
Moderator
Nature Recordists e-mail group
http://groups.yahoo.com/group/naturerecordists
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