The temporal pattern of the gopher frog sample has a strong
resemblance but the tonal structure of the lowest frequencies seem
closer to those of the Jerusalem Cricket sample
https://pantherfile.uwm.edu/type/public/images/Rob_Stan_JerusalemCricket.jpg
https://pantherfile.uwm.edu/type/public/images/Rob_Stan_GopherFrog.jpg
There appears to be considerable temporal pattern variety in
Jerusalem Cricket calling. Some produce very slow drum rates like the
posted female sample recorded by Dr. Amy Vandergast:
https://pantherfile.uwm.edu/type/public/media/Female_Mahogany_Jerusalem_Cricket.EatonLACO.mp3
and others are much faster, up to around 40 drums per second. My
critter is calling around 37 drums per second; Stan's about 35 drums
per second.
I've contacted Dr. Amy Vandergast to see if she can help us. Rob D.
= = = =
At 8:50 PM -0400 9/21/09, Badger wrote:
>
>Nice "call" on the gopher frog, if the crayfish frog has a long pause
>between calls then it could easily have made that recorded call.
>That long pause is my main objection to the insect-origin theory.
>Just going on gut feeling here, as the noise was totally new to me.
>
>Guy M.
>
>On Sep 21, 2009, at 7:13 PM, Gene Dorcas wrote:
>
>> Could be a crayfish frog (Rana areolata) in Illinois. They are
>> found in
>> southern Illinois and have a "snore-like" call. Crayfish frogs
>> sound like
>> gopher frogs and can breed anytime if conditions are right (i.e.,
>> after
>> major rains usually).
>>
>> Here's link to a gopher frog with call
>>
>>
>><http://www.herpsofnc.org/herps_of_NC/anurans/Rancap/Ran_cap.html>http://www.herpsofnc.org/herps_of_NC/anurans/Rancap/Ran_cap.html
>>
>> From: stancourtney
>>[mailto:<stancourtney%40hotmail.com>
>> Sent: Sunday, September 20, 2009 1:54 PM
>> To:
>><naturerecordists%40yahoogroups.com>
>> Subject: [Nature Recordists] Is this a locust or insect of some type?
>>
>> I recorded this unusual sounds a couple of nights ago in an oak-
>> hickory
>> forest here in Central Illinois. The recorder was left running
>> unattended
>> for 2 nights.
>>
>> I am thinking some type of locust or insect, probably too late for
>> frogs.
>>
>>
>><http://www.stancourtney.com/sounds/2009.09.19.mp3>http://www.stancourtney.com/sounds/2009.09.19.mp3
>>
>> Thanks,
>>
>> Stan Courtney
>>
>> Central Illinois
>>
>>
>>
>>
>
>
>
>
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