Hi Rich
I listened to your mystery sound...I'm not totally convinced that it's
natural, but I really can't say what it is. I can't think of anything
'artificial' that it might be either! It doesn't sound like anything I've
heard a cowbird do, but if it did turn out to be a bird of any sort, it's
likely not been previously documented.
Interesting, but sorry I can't be more helpful.
Mark Phinney
on 5/2/05 8:19 AM, Rich Peet at wrote:
> State Line WI and IL in US.
> Forrest edge 1/2 mile from any road or building.
>
> Hook shaped whistle decending clean then ascending not as clean.
> Sometimes starts as low as 8,000 cycles and sometimes starts above
> 20,000. Duration also variable. Heard as well as recorded. Direction
> could not be determined to get the dish on it. Frequency was about 1
> time per min. I did not have 24/96 equipment with me this day to
> capture the upper range. I will return for that if the sound is natural.
>
> My best guess right now is Brown Headed Cow Bird. But I did not know
> they could go ultrasonic.
>
> Visual sound 122kb download at:
> http://home.comcast.net/~richpeet/unk.JPG
>
> Two sound examples 1.2 meg download at:
> http://home.comcast.net/~richpeet/unk.mp3
>
> Any help?
>
> Rich Peet
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> "Microphones are not ears,
> Loudspeakers are not birds,
> A listening room is not nature."
> Klas Strandberg
> Yahoo! Groups Links
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