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Thanks for all the interesting information John. It is good know some birds=
like Yellow-rumped Warblers will head further south if the winter is harsh=
. I wondered about that before. I once read that black duck will perish ra=
ther than head somewhere else if the water they are wintering on freezes ov=
er. I hope it was just a poor choice of words because it made sound like th=
at ducks wintering at Long Lake, Halifax for instance would not head to th=
e coast a few clicks away if the lake froze, which I don=92t believe. I ass=
ume what the article should have said is that ducks will not migrate away f=
rom a non-coastal area if all the water freezes over.
Keith
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s 10
From: John Kearney<mailto:john.kearney@ns.sympatico.ca>
Sent: Tuesday, October 17, 2017 9:26 PM
To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca>
Subject: RE: [NatureNS] Nocturnal migration for the 1st Week of October
Hi Keith.
Very good questions. Yellow-rumped Warblers are long-distance migrants but =
are interesting because they are known to migrate south not only in the aut=
umn but also in the winter. Studies in New England have shown that Yellow-r=
umped Warblers will move further south in the middle of a severe winter and=
not do so during a mild winter. One therefore has to wonder if Yellow-rump=
s wintering in coastal Nova Scotia die off during a cold snap or depart for=
warmer climes.
There is some evidence from tagging and observational studies that Yellow-r=
umped Warblers don=92t like to cross large bodies of water. I tend to think=
the Yellow-rumps that I=92m detecting at Cape Forchu recently are a mixtur=
e of birds that were travelling southwest over Nova Scotia and others that =
were displaced by wind from the west, but in both cases are now heading wes=
t-northwest over the Bay of Fundy.
Indigo Buntings nest not that far from us and could have been driven here b=
y weather from the west or perhaps are young birds exploring new territory =
as this species is undergoing range expansion.
American Robins winter mainly in the southeastern USA from Delaware south. =
The ones that winter here tend to concentrate in coastal areas with good be=
rry crops. Last winter we had a fluky late winter invasion in southwest Nov=
a Scotia of robins that appeared to be from the Delaware region and dropped=
here and on Cape Cod by a weather bomb. These birds seem to have returned =
south again after the event.
Black-capped Chickadees are said to undergo periodic eruptions of juvenile =
birds rather than having true migration. I will detect a few Black-capped C=
hickadees every year in my nocturnal recordings in October. However, one mo=
rning in Antigonish County along the Northumberland Strait I had 800 Chicka=
dees literally fall from the sky around me. They all flew northeast and a f=
ew minutes later came back and flew southwest.
Song Sparrows have migratory populations in the north of their range (like =
Nova Scotia) but have sedentary populations in the southern part of their r=
ange. It is believed our Song Sparrows leap-frog over the sedentary populat=
ions to winter in the southern USA. But obviously there is a sedentary comp=
onent to our population as well.
John
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
On Behalf Of Keith Lowe
Sent: October-17-17 16:20
To: naturens@chebucto.ns.ca
Subject: RE: [NatureNS] Nocturnal migration for the 1st Week of October
I see a lot of Yellow-rumped Warblers (YRWA) have been pulling out lately.=
Has their even been any studies done on the successfulness of the species =
that only partial migrate? So many YRWA migrate I don=92t know if is consid=
ered a partial migrant or not. I would guess about 2% give or take of the c=
oastal YRWA from Halifax to Cape Sable stay along with a few stragglers els=
ewhere. It would be interesting to know how many actually stay and if the o=
nes that over-winter are mostly ours or did they came from further north or=
the interior. What percentage survives compared to what percentage survive=
and return of the ones that migrate?
And ditto for other partial migrates. How many Song Sparrow over-winter? 10=
%? Robbins 2%? Black-capped Chickadees, I hesitate to guess 50%?
John, or anyone else that wants to weigh in, I know most of the birds are o=
utgoing. Were those Indigo Bunting likely incoming? Or overshoots heading b=
ack?
Keith
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s 10
From: John Kearney<mailto:john.kearney@ns.sympatico.ca>
Sent: Tuesday, October 17, 2017 3:21 PM
To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca>
Subject: [NatureNS] Nocturnal migration for the 1st Week of October
Hi All,
Nocturnal migration was down again during the 1st week of October at the tw=
o Yarmouth County monitoring sites. Details can be found at these two links=
:
Carleton: http://johnfkearney.com/Carleton_Yarmouth_County_2017.html
Cape Forchu: http://johnfkearney.com/Cape_Forchu_Yarmouth_County_2017.html
The low numbers at both sites suggest that birds are beginning to cross the=
Bay of Fundy rather than make a longer journey across the Gulf of Maine to=
avoid weather conditions such as stronger winds.
Rare or uncommon birds for the week included Indigo Buntings, Field Sparrow=
, and Clay-colored Sparrow.
John
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Thanks for all the interesting information John. It =
is good know some birds like Yellow-rumped Warblers will head further south=
if the winter is harsh. I wondered about that before. I once read that bla=
ck duck will perish rather than head
somewhere else if the water they are wintering on freezes over. I hope it =
was just a poor choice of words because it made sound like that ducks winte=
ring at Long Lake, Halifax for instance would not head to the coast a=
few clicks away if the lake froze, which
I don=92t believe. I assume what the article should have said is that duck=
s will not migrate away from a non-coastal area if all the water freezes ov=
er.
</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Keith</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Sent from <a href=3D"https://go.microsoft.com/fwlink=
/?LinkId=3D550986">
Mail</a> for Windows 10</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<div style=3D"mso-element:para-border-div;border:none;border-top:solid #E1E=
1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal" style=3D"border:none;padding:0in"><b>From: </b><a hr=
ef=3D"mailto:john.kearney@ns.sympatico.ca">John Kearney</a><br>
<b>Sent: </b>Tuesday, October 17, 2017 9:26 PM<br>
<b>To: </b><a href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.=
ca</a><br>
<b>Subject: </b>RE: [NatureNS] Nocturnal migration for the 1st Week of Octo=
ber</p>
</div>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Hi Keith.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Very good questions. Yellow-rum=
ped Warblers are long-distance migrants but are interesting because they ar=
e known to migrate south not only in the autumn but also in the winter. Stu=
dies in New England have shown that
Yellow-rumped Warblers will move further south in the middle of a severe w=
inter and not do so during a mild winter. One therefore has to wonder if Ye=
llow-rumps wintering in coastal Nova Scotia die off during a cold snap or d=
epart for warmer climes.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">There is some evidence from tag=
ging and observational studies that Yellow-rumped Warblers don=92t like to =
cross large bodies of water. I tend to think the Yellow-rumps that I=92m de=
tecting at Cape Forchu recently are a mixture
of birds that were travelling southwest over Nova Scotia and others that w=
ere displaced by wind from the west, but in both cases are now heading west=
-northwest over the Bay of Fundy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Indigo Buntings nest not that f=
ar from us and could have been driven here by weather from the west or perh=
aps are young birds exploring new territory as this species is undergoing r=
ange expansion.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">American Robins winter mainly i=
n the southeastern USA from Delaware south. The ones that winter here tend =
to concentrate in coastal areas with good berry crops. Last winter we had a=
fluky late winter invasion in southwest
Nova Scotia of robins that appeared to be from the Delaware region and dro=
pped here and on Cape Cod by a weather bomb. These birds seem to have retur=
ned south again after the event.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Black-capped Chickadees are sai=
d to undergo periodic eruptions of juvenile birds rather than having true m=
igration. I will detect a few Black-capped Chickadees every year in my noct=
urnal recordings in October. However,
one morning in Antigonish County along the Northumberland Strait I had 800=
Chickadees literally fall from the sky around me. They all flew northeast =
and a few minutes later came back and flew southwest.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Song Sparrows have migratory po=
pulations in the north of their range (like Nova Scotia) but have sedentary=
populations in the southern part of their range. It is believed our Song S=
parrows leap-frog over the sedentary
populations to winter in the southern USA. But obviously there is a sedent=
ary component to our population as well.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">John<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> naturens-owner@chebucto.ns.ca [mailto:n=
aturens-owner@chebucto.ns.ca]
<b>On Behalf Of </b>Keith Lowe<br>
<b>Sent:</b> October-17-17 16:20<br>
<b>To:</b> naturens@chebucto.ns.ca<br>
<b>Subject:</b> RE: [NatureNS] Nocturnal migration for the 1st Week of Octo=
ber<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal">I see a lot of Yellow-rumped Warblers (YRWA) h=
ave been pulling out lately. Has their even been any studies done on the su=
ccessfulness of the species that only partial migrate? So many YRWA migrate=
I don=92t know if is considered a partial
migrant or not. I would guess about 2% give or take of the coastal YRWA fr=
om Halifax to Cape Sable stay along with a few stragglers elsewhere. It wou=
ld be interesting to know how many actually stay and if the ones that over-=
winter are mostly ours or did they
came from further north or the interior. What percentage survives compared=
to what percentage survive and return of the ones that migrate?
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">And ditto for other partial migrates. How many Song =
Sparrow over-winter? 10%? Robbins 2%? Black-capped Chickadees, I hesitate t=
o guess 50%?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">John, or anyone else that wants to weigh in, I know =
most of the birds are outgoing. Were those Indigo Bunting likely incoming? =
Or overshoots heading back?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Keith<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Sent from <span lang=3D"EN-CA"><a href=3D"https://go=
.microsoft.com/fwlink/?LinkId=3D550986"><span lang=3D"EN-US">Mail</span></a=
></span> for Windows 10<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From: </b><span lang=3D"EN-CA"><a href=3D"mailto:=
john.kearney@ns.sympatico.ca"><span lang=3D"EN-US">John Kearney</span></a><=
/span><br>
<b>Sent: </b>Tuesday, October 17, 2017 3:21 PM<br>
<b>To: </b><span lang=3D"EN-CA"><a href=3D"mailto:naturens@chebucto.ns.ca">=
<span lang=3D"EN-US">naturens@chebucto.ns.ca</span></a></span><br>
<b>Subject: </b>[NatureNS] Nocturnal migration for the 1st Week of October<=
o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Hi All,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Nocturnal migration was down ag=
ain during the 1<sup>st</sup> week of October at the two Yarmouth County mo=
nitoring sites. Details can be found at these two links:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Carleton: <a href=3D"http://joh=
nfkearney.com/Carleton_Yarmouth_County_2017.html">
http://johnfkearney.com/Carleton_Yarmouth_County_2017.html</a><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Cape Forchu: <a href=3D"http://=
johnfkearney.com/Cape_Forchu_Yarmouth_County_2017.html">
http://johnfkearney.com/Cape_Forchu_Yarmouth_County_2017.html</a><o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">The low numbers at both sites s=
uggest that birds are beginning to cross the Bay of Fundy rather than make =
a longer journey across the Gulf of Maine to avoid weather conditions such =
as stronger winds.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">Rare or uncommon birds for the =
week included Indigo Buntings, Field Sparrow, and Clay-colored Sparrow.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-CA">John</span><span lang=3D"EN-CA"=
style=3D"font-size:10.0pt;font-family:"Comic Sans MS""><o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Co=
mic Sans MS""><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
</div>
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