Re:[nfc-l] Barn Owl Candidate - Etna, NY

2012-08-15 Thread Paul Hurtado
Hi all,

I returned with a shotgun mic and minidisc recorder this morning and
was able to relocate the source of my mystery owl (it was a GREAT
HORNED OWL, not Barn) and get both a visual ID and better recordings
of the calls.  Sound traveling over large distances (especially
horizontally through vegetation) can be filtered by the environment
and in this case it appears what I had heard was a fairly typical
Great Horned Owl vocalization, but the distance had left me hearing
(and initially, recording) just the lower frequency components of the
calls, which lead to my initial confusion.

The recording made yesterday, which is best listened to with
headphones and while watching the spectrogram:
   http://soundcloud.com/paul-j-hurtado/battelle-darby-owl-14aug2012

Here's the best clip from a visually confirmed GHOW this morning. The
first version is closer to the raw recording, the second sounds
better:
   http://soundcloud.com/paul-j-hurtado/great-horned-owl-15aug2012
(high pass filter only, WAV format)
   http://www.xeno-canto.org/107584   (high pass filter plus noise
reduction using Audacity, MP3 format)

As far as the ID problem, it seems that the the downslur at the end of
these GHOW calls might be a good indicator of GHOW over BANO?

Best,
Paul

On Tue, Aug 14, 2012 at 9:55 PM, Paul Hurtado  wrote:
> Hello everyone,
>
> Early this morning I recorded (with my phone, unfortunately) what I think is
> a Barn Owl just outside of Columbus Ohio where there have been unconfirmed
> reports of Barn Owl in recent weeks.  The vocalizations I heard were very
> similar to Chris T-H's recording that was recently shared with this list,
> but with a bit of a downslur at the end of the calls.  The recording was
> made while two individuals were apparently flying over mixed open
> grassland/wetland area (if they were perched, they would have been
> frequently flying from perch to perch). An adult Great Horned Owl was heard
> far off in the distance, and the birds were never seen.
>
> I'd also love to know whether this is indeed a Barn Owl or could possibly be
> something else (and if so, what)?
>
> A spectrogram and clip of the best call I managed to record (barely audible
> without headphones and the volume turned up) can be found at
>
>http://soundcloud.com/paul-j-hurtado/battelle-darby-owl-14aug2012
>
> Assuming these birds stick around, I might return to the area in the next
> day or two with better equipment to get a decent recording and visual
> confirmation of the ID. Until then, any and all comments are welcomed!
>
> Paul Hurtado
> Columbus, OH

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Re: [nfc-l] Barn Owl Candidate - Etna, NY

2012-08-14 Thread Paul Hurtado
Hello everyone,

Early this morning I recorded (with my phone, unfortunately) what I think
is a Barn Owl just outside of Columbus Ohio where there have been
unconfirmed reports of Barn Owl in recent weeks.  The vocalizations I heard
were very similar to Chris T-H's recording that was recently shared with
this list, but with a bit of a downslur at the end of the calls.  The
recording was made while two individuals were apparently flying over mixed
open grassland/wetland area (if they were perched, they would have been
frequently flying from perch to perch). An adult Great Horned Owl was heard
far off in the distance, and the birds were never seen.

I'd also love to know whether this is indeed a Barn Owl or could possibly
be something else (and if so, what)?

A spectrogram and clip of the best call I managed to record (barely audible
without headphones and the volume turned up) can be found at

   http://soundcloud.com/paul-j-hurtado/battelle-darby-owl-14aug2012

Assuming these birds stick around, I might return to the area in the next
day or two with better equipment to get a decent recording and visual
confirmation of the ID. Until then, any and all comments are welcomed!

Paul Hurtado
Columbus, OH

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Re: [nfc-l] Barn Owl Candidate - Etna, NY

2012-08-02 Thread Jay McGowan
Very cool, Chris! Here is my eBird report from Friday night with details of
my owl, for those interested. No recordings, unfortunately.

http://ebird.org/ebird/view/checklist?subID=S11248369

-Jay

On Thu, Aug 2, 2012 at 9:06 AM, Christopher T. Tessaglia-Hymes <
c...@cornell.edu> wrote:

>  Last night, I recorded a few distant unusual-sounding screams
> (unfamiliar to me at my recording location), the loudest and closest of
> which sounds and spectrographically looks like a very near match for BARN
> OWL. This is an extremely rare migrant through Upstate, NY. I would
> appreciate any input from other NFC listeners.
>
>  What is interesting is that Jay McGowan heard a likely Barn Owl over his
> place in Ithaca on 27 July.
>
>  This bird was calling at 23:54 last night (1 August). It is possible
> that birds are passing through the area, or that there is a single bird
> moving around the area. Not knowing much about their behavior at this time
> of year, as far as local movement, makes me think more the former, that
> there were two coincidental migrants a few days apart.
>
>  This sound is more evenly raspy sounding and less "question-like"
> sounding than an immature Great Horned Owl call. The sound also falls
> nicely around the 2kHz frequency band, which is consistent with the
> examples provided on the Evans and O'Brien CD-ROM.
>
>  Attached is a clip of the best sound (thus far � I am still going
> through data) as well as a screen grab of the call.
>
>  Thanks for any input!
>
>
>  Sincerely,
> Chris T-H
>
>--
>  Christopher T. Tessaglia-Hymes
>  Field Applications Engineer
>  Bioacoustics Research Program, Cornell Lab of Ornithology
>  159 Sapsucker Woods Road, Ithaca, New York 14850
>  W: 607-254-2418   M: 607-351-5740   F: 607-254-1132
>  http://www.birds.cornell.edu/brp
>
>
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Jay McGowan
Macaulay Library
Cornell Lab of Ornithology
jw...@cornell.edu

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[nfc-l] Barn Owl Candidate - Etna, NY

2012-08-02 Thread Christopher T. Tessaglia-Hymes
Last night, I recorded a few distant unusual-sounding screams (unfamiliar to me 
at my recording location), the loudest and closest of which sounds and 
spectrographically looks like a very near match for BARN OWL. This is an 
extremely rare migrant through Upstate, NY. I would appreciate any input from 
other NFC listeners.

What is interesting is that Jay McGowan heard a likely Barn Owl over his place 
in Ithaca on 27 July.

This bird was calling at 23:54 last night (1 August). It is possible that birds 
are passing through the area, or that there is a single bird moving around the 
area. Not knowing much about their behavior at this time of year, as far as 
local movement, makes me think more the former, that there were two 
coincidental migrants a few days apart.

This sound is more evenly raspy sounding and less "question-like" sounding than 
an immature Great Horned Owl call. The sound also falls nicely around the 2kHz 
frequency band, which is consistent with the examples provided on the Evans and 
O'Brien CD-ROM.

Attached is a clip of the best sound (thus far � I am still going through data) 
as well as a screen grab of the call.

Thanks for any input!

[cid:f9b74dc5-1cfe-4f93-bbb1-8ba4d1e36253@cornell.edu]

Sincerely,
Chris T-H

--
Christopher T. Tessaglia-Hymes
Field Applications Engineer
Bioacoustics Research Program, Cornell Lab of Ornithology
159 Sapsucker Woods Road, Ithaca, New York 14850
W: 607-254-2418   M: 607-351-5740   F: 607-254-1132
http://www.birds.cornell.edu/brp



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Description: ETNA_NY_20120801.235435_Barn Owl.wav