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Hi Randy,
With nocturnal monitoring, you can only count the number of calls and not
the number of birds. In general, calls of the same species that are more
than one minute apart probably represent two different individuals. As for
Indigo Buntings, the acoustic monitoring provides supporting information
about the relatively large numbers of this species that can occur in Nova
Scotia during the spring and fall migrations. Last autumn my recording
equipment picked up 20 Indigo Bunting calls at a high elevation, inland
location in Pictou County. This autumn, at a near sea-level, coastal
location in Antigonish County I have recorded 19 Indigo Bunting calls.
John
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca]
On Behalf Of Randy Lauff
Sent: October 22, 2012 09:41
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Nocturnal Migration This Week
Hi John,
"and Indigo Bunting (probable) with 4 calls within a few seconds of each
other."
How far apart, in time, do the calls have to be before you count them as, in
this case, four birds, instead of one (calling repeatedly)? Thanks for these
reports...I wonder if we have a secret enclave of breeding Indigos up here!
Randy
_________________________________
RF Lauff
Way in the boonies of
Antigonish County, NS.
On 20 October 2012 20:00, John Kearney <john.kearney@ns.sympatico.ca> wrote:
It was a slow week for night migration over Antigonish County this week.
Poor weather made migration difficult no doubt but overall it seems that we
are now past the peak movements. Among the 321 flight calls recorded this
week, sparrows were again dominant. White-throated Sparrows were the most
common, followed by Song Sparrow, Savannah Sparrow, and Dark-eyed Junco.
Warblers were reduced to a total of only 15 calls. Rare or unusual birds
this week were Orange-crowned Warbler (probable) with 1 call on 2 different
nights and Indigo Bunting (probable) with 4 calls within a few seconds of
each other. The summary of all flight calls for the week beginning the
evening of October 12 and ending the morning of October 19 is as follows:
Golden-crowned Kinglet - 1
Hermit Thrush - 2
American Robin - 5
Yellow-rumped Warbler - 10
Orange-crowned Warbler - 2
Common Yellowthroat - 3
Chipping Sparrow - 11
Savannah Sparrow - 60
Song Sparrow - 68
Lincoln's/Swamp Sparrow - 13
White-throated Sparrow - 77
Dark-eyed Junco - 32
Other unidentified sparrows - 23
Indigo Bunting - 4
Other unidentified songbirds - 5
Other unidentified birds - 5
Total - 321
As usual the charts summarizing the autumn migration can be viewed at:
http://www.johnfkearney.com/Nocturnal_Migration.html
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-CA link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Randy,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>With nocturnal monitoring, you can only count the number of calls and =
not the number of birds. In general, calls of the same species that are =
more than one minute apart probably represent two different individuals. =
As for Indigo Buntings, the acoustic monitoring provides supporting =
information about the relatively large numbers of this species that can =
occur in Nova Scotia during the spring and fall migrations. Last autumn =
my recording equipment picked up 20 Indigo Bunting calls at a high =
elevation, inland location in Pictou County. This autumn, at a near =
sea-level, coastal location in Antigonish County I have recorded 19 =
Indigo Bunting calls.<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><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>Randy Lauff<br><b>Sent:</b> October 22, 2012 =
09:41<br><b>To:</b> naturens@chebucto.ns.ca<br><b>Subject:</b> Re: =
[NatureNS] Nocturnal Migration This Week<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p> </o:p><