Hi--
Rich Peet has suggested it might be a Drumming Katydid, an invasive
species that is showing up in North America:
http://bugguide.net/node/view/8022/data. It's a very close match,
tonally (especially ignoring the possible low Hz amplification
effects of a sounding board). There's no wind-up/wind-down in the
song sample he found of the Drumming Katydid and it's surprising
small: http://www.whatsthatbug.com/images/drummingkatydidfml2.jpg
Here's a comparison between the Drumming Katydid and my critter with
the former first:
https://pantherfile.uwm.edu/type/public/media/10683outrimComparisonw_Drummi=
ng-Katydid.aif
Rob D.
=3D =3D =3D =3D =3D =3D
At 9:04 AM -0500 9/23/09, Richard Peet wrote:
>>Ok, Then my guess is an invasive Drumming-katydid from England.
>>
>>http://www.whatsthatbug.com/2006/07/30/drumming-katydid-in-western-canada=
/
>>According to the Singing Insects of North Americs
>><http://buzz.ifas.ufl.edu/index.htm> website, the subfamily of
>>Meconematinae is represented in the US by only one species, M.
>>thalassinum, which has been introduced from Europe.
>>http://bugguide.net/node/view/8022/data
>>
>>This species does not have a normal song but drums on leaves with a
>>hind foot. It is just about audible to humans at about 1m.
>>
>>Found one sound clip from England where it originates.
>>
>>http://www.biolib.cz/en/taxonsoundclip/id13/
>>
>>Rich
>>
>
=3D =3D =3D =3D
At 1:02 AM -0500 9/22/09, Rob Danielson wrote:
>
>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_JerusalemCricke=
t.jpg
>
><https://pantherfile.uwm.edu/type/public/images/Rob_Stan_GopherFrog.jpg>ht=
tps://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_C=
ricket.EatonLACO.mp3>https://pantherfile.uwm.edu/type/public/media/Female_M=
ahogany_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.
>
>=3D =3D =3D =3D
>
>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><http://www.her=
psofnc.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><stancourtney%40hotmai=
l.com>
>>> Sent: Sunday, September 20, 2009 1:54 PM
>>> To:
>>><naturerecordists%40yahoogroups.com><naturerecordists%40ya=
hoogroups.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.stancourt=
ney.com/sounds/2009.09.19.mp3><http://www.stancourtney.com/sounds/2009.09.1=
Message: 9.
Subject: mp3>http://www.stancourtney.com/sounds/2009.09.19.mp3
>>>
>>> Thanks,
>>>
>>> Stan Courtney
>>>
>>> Central Illinois
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>--
>
>
>
>
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