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That=E2=80=99s very interesting Ron. A recent study in the Great Lakes =
region showed strong correlations between acoustic monitoring and =
mist-netting in terms of the magnitude and timing of migration.
John
=20
Full reference: Sanders, Claire E., and Daniel J. Mennill. 2014. =
"Acoustic monitoring of nocturnally migrating birds accurately assesses =
the timing and magnitude of migration through the Great Lakes." The =
Condor no. 116 (3):371-383.
=20
=20
From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Ronald Arsenault
Sent: August-21-14 15:02
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Nocturnal Migration for the Week of August =
11-17, 2014
=20
Hello,
Our observatons on Brier this week show a remarkable similarity to those =
made by John last week in Amherst. Redstarts
were very prominent while Chestnut-sided Warblers and Canada Warblers =
were encountered more frequently than expected. On the other hand, few =
Yellow Warblers were seen.
Ron Arsenault
Temporarily on Brier.
On Aug 21, 2014 11:16 AM, "John Kearney" <john.kearney@ns.sympatico.ca> =
wrote:
>
> Hi All,
>
> This year I am conducting acoustic monitoring of nocturnal migration =
over Amherst, Nova Scotia. I will try to report results on a weekly =
basis to NatureNS. This work is funded by Natural Forces Inc. and is =
part of an environmental assessment for a proposed wind energy facility. =
Since the acoustic work is being done remotely, I=E2=80=99m using =
battery powered recording equipment that doesn=E2=80=99t have as a high =
a reach into the sky (about 150 meters) compared to equipment that can =
be connected to an electric line (with a reach of about 300 meters).
>
> =20
>
> As for this week results, most flight calls were the early migrating =
warblers. These are dominated by American Redstarts (121 calls) and =
Yellow Warblers (63 calls). The number of Chestnut-sided Warblers (58 =
calls) is higher than what I have experienced previously in Nova Scotia. =
There were also unusually high numbers of Canada Warbler (28 calls) and =
Cape May Warbler (26 calls). The rarest bird was Prairie Warbler with 4 =
calls detected. A total of 515 calls were detected during the 7-day =
period. A list of all birds detected is given below in order of the =
highest to lowest number of calls detected.
>
> =20
>
> At the beginning of this migration season, I wish to highlight some =
main features of acoustic monitoring of nocturnal migration.
>
> Results are reported in terms of the number of calls and not the =
number of birds recorded since it is not possible to determine if a bird =
has given more than one call during the time it was recorded.
>
> Night flight calls are primarily identified by looking at the =
spectrogram (also known as a sonogram) since flight calls are very =
difficult to identify by just listening to them. For many species their =
night flight call is a unique call that they give only when migrating at =
night.
>
> The spectrogram of the night flight calls of some species are very =
hard to distinguish from related species. Therefore it is not possible =
to make identifications with the same certainty as with visual =
identification of a bird. With experience, one can say that there is a =
=E2=80=9Chigh probability=E2=80=9D that a particular night flight call =
was made by a particular species. Thus the results reported below should =
be seen as a list of probable species detected with an indication of the =
intensity of their migration by the number of flight calls detected.
>
> =20
>
> Nocturnal Migration Summary for August 11-17, 2014 over Amherst, =
Cumberland County, Nova Scotia
>
> =20
>
> Species
>
> Calls
>
> American Redstart
>
> 121
>
> Yellow Warbler
>
> 63
>
> Chestnut-sided Warblers
>
> 58
>
> Magnolia Warbler
>
> 34
>
> Unidentified Warblers
>
> 32
>
> Canada Warbler
>
> 28
>
> Black-and-White Warbler
>
> 27
>
> Cape May Warbler
>
> 26
>
> Unidentified Genus Setophaga
>
> 23
>
> Least Sandpiper
>
> 21
>
> Ovenbird
>
> 20
>
> Bay-breasted Warbler
>
> 15
>
> Norther Waterthrush
>
> 12
>
> Golden-crowned Kinglet
>
> 7
>
> Black-throated Green Warbler
>
> 6
>
> Unidentified Songbirds
>
> 4
>
> Prairie Warbler
>
> 4
>
> Unidentified Birds
>
> 4
>
> Northern Parula
>
> 2
>
> Blackburnian Warbler
>
> 1
>
> Blackpoll Warbler
>
> 1
>
> Chipping Sparrow
>
> 1
>
> Unidentified Sparrows
>
> 1
>
> Killdeer
>
> 1
>
> Savannah Sparrow
>
> 1
>
> Wilson's Warbler
>
> 1
>
> Yellow-rumped Warbler
>
> 1
>
> Total
>
> 515
>
> =20
>
> =20
>
> =20
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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>That=E2=80=99s very interesting Ron. A recent study in the Great =
Lakes region showed strong correlations between acoustic monitoring and =
mist-netting in terms of the magnitude and timing of =
migration.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>John<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-36.0pt;text-autospace:none'><spa=
n =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p class=3DMsoNormal =
style=3D'margin-left:36.0pt;text-indent:-36.0pt;text-autospace:none'><spa=
n =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Full reference: </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#17375=
E;mso-style-textfill-fill-color:#17375E;mso-style-textfill-fill-alpha:100=
.0%;mso-fareast-language:EN-US'>Sanders, Claire E., and Daniel J. =
Mennill. 2014. "Acoustic monitoring of nocturnally migrating birds =
accurately assesses the timing and magnitude of migration through the =
Great Lakes." <i>The Condor</i> no. 116 =
(3):371-383.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
<b>On Behalf Of </b>Ronald Arsenault<br><b>Sent:</b> August-21-14 =
15:02<br><b>To:</b> naturens@chebucto.ns.ca<br><b>Subject:</b> Re: =
[NatureNS] Nocturnal Migration for the Week of August 11-17, =
2014<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p> </o:p></p><p>Hello,<o:p></o:p></p><p>Our =
observatons on Brier this week show a remarkable similarity to those =
made by John last week in Amherst. Redstarts<br>were very prominent =
while Chestnut-sided Warblers and Canada Warblers were encountered more =
frequently than expected. On the other hand, few Yellow Warblers were =
seen.<o:p></o:p></p><p>Ron Arsenault<br>Temporarily on =
Brier.<o:p></o:p></p><p>On Aug 21, 2014 11:16 AM, "John =
Kearney" <<a =
href=3D"mailto:john.kearney@ns.sympatico.ca">john.kearney@ns.sympatico.ca=
</a>> wrote:<br>><br>> Hi All,<br>><br>> This year I am =
conducting acoustic monitoring of nocturnal migration over Amherst, Nova =
Scotia. I will try to report results on a weekly basis to NatureNS. This =
work is funded by Natural Forces Inc. and is part of an environmental =
assessment for a proposed wind energy facility. Since the acoustic work =
is being done remotely, I=E2=80=99m using battery powered recording =
equipment that doesn=E2=80=99t have as a high a reach into the sky =
(about 150 meters) compared to equipment that can be connected to an =
electric line (with a reach of about 300 meters).<br>><br>> =
<br>><br>> As for this week results, most flight calls were =
the early migrating warblers. These are dominated by American Redstarts =
(121 calls) and Yellow Warblers (63 calls). The number of Chestnut-sided =
Warblers (58 calls) is higher than what I have experienced previously in =
Nova Scotia. There were also unusually high numbers of Canada Warbler =
(28 calls) and Cape May Warbler (26 calls). The rarest bird was Prairie =
Warbler with 4 calls detected. A total of 515 calls were detected during =
the 7-day period. A list of all birds detected is given below in order =
of the highest to lowest number of calls detected.<br>><br>> =
<br>><br>> At the beginning of this migration season, I wish =
to highlight some main features of acoustic monitoring of nocturnal =
migration.<br>><br>> Results are reported in terms of the number =
of calls and not the number of birds recorded since it is not possible =
to determine if a bird has given more than one call during the time it =
was recorded.<br>><br>> Night flight calls are primarily =
identified by looking at the spectrogram (also known as a sonogram) =
since flight calls are very difficult to identify by just listening to =
them. For many species their night flight call is a unique call that =
they give only when migrating at night.<br>><br>> The spectrogram =
of the night flight calls of some species are very hard to distinguish =
from related species. Therefore it is not possible to make =
identifications with the same certainty as with visual identification of =
a bird. With experience, one can say that there is a =E2=80=9Chigh =
probability=E2=80=9D that a particular night flight call was made by a =
particular species. Thus the results reported below should be seen as a =
list of probable species detected with an indication of the intensity of =
their migration by the number of flight calls detected.<br>><br>> =
<br>><br>> Nocturnal Migration Summary for August 11-17, =
2014 over Amherst, Cumberland County, Nova Scotia<br>><br>> =
<br>><br>> Species<br>><br>> Calls<br>><br>> =
American Redstart<br>><br>> 121<br>><br>> Yellow =
Warbler<br>><br>> 63<br>><br>> Chestnut-sided =
Warblers<br>><br>> 58<br>><br>> Magnolia =
Warbler<br>><br>> 34<br>><br>> Unidentified =
Warblers<br>><br>> 32<br>><br>> Canada =
Warbler<br>><br>> 28<br>><br>> Black-and-White =
Warbler<br>><br>> 27<br>><br>> Cape May =
Warbler<br>><br>> 26<br>><br>> Unidentified Genus =
Setophaga<br>><br>> 23<br>><br>> Least =
Sandpiper<br>><br>> 21<br>><br>> Ovenbird<br>><br>> =
20<br>><br>> Bay-breasted Warbler<br>><br>> =
15<br>><br>> Norther Waterthrush<br>><br>> =
12<br>><br>> Golden-crowned Kinglet<br>><br>> =
7<br>><br>> Black-throated Green Warbler<br>><br>> =
6<br>><br>> Unidentified Songbirds<br>><br>> =
4<br>><br>> Prairie Warbler<br>><br>> 4<br>><br>> =
Unidentified Birds<br>><br>> 4<br>><br>> Northern =
Parula<br>><br>> 2<br>><br>> Blackburnian =
Warbler<br>><br>> 1<br>><br>> Blackpoll =
Warbler<br>><br>> 1<br>><br>> Chipping =
Sparrow<br>><br>> 1<br>><br>> Unidentified =
Sparrows<br>><br>> 1<br>><br>> Killdeer<br>><br>> =
1<br>><br>> Savannah Sparrow<br>><br>> 1<br>><br>> =
Wilson's Warbler<br>><br>> 1<br>><br>> Yellow-rumped =
Warbler<br>><br>> 1<br>><br>> Total<br>><br>> =
515<br>><br>> <br>><br>> <br>><br>> =
<o:p></o:p></p></div></body></html>
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