Hi Ted,
That is a nice recording! I have no idea what the call is. Grebe-ish popped 
into my head.
I've attached a file with a call that sounds and looks similar to yours. Do you 
think they are the same? 
We recorded it the night of Sept 26 in southern Ravalli County, MT at a remote 
acoustic monitoring site. 
Debbie Leick
MPG Ranch
Florence, MT

 From:   Ted Floyd <tfl...@aba.org> 
 To:   NFC-L <nf...@list.cornell.edu> 
 Sent:   9/23/2017 4:51 AM 
 Subject:   [nfc-l] Just for fun (night flight call, Sept. 23, Lafayette, 
Colorado, USA) 

Hey, all. Anybody know what's calling at the 2.0-sec. mark? I'm pretty sure I 
know, but I thought I'd put it out there as a quiz. Check out the awesome 
reverb--and that's perhaps a clue.

Also audible are the crickets Oecanthus fultoni and Gryllus pennsylvanicus. And 
a certain owl... ;-)

Location is eastern Boulder County, Colorado, USA. Recorded earlier this 
Saturday morning, Sept. 23, under very light drizzle.


Ted Floyd
Lafayette, Boulder County, Colorado, USA


Ted Floyd
Editor, Birding magazine
Managing Editor, North American Birds

Website: http://aba.org/birding
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