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ses the species that the peaks are composed of change. T
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Hi Carmel and All,
=20
My continued nocturnal monitoring will depend on the weather. A =
microphone cannot withstand too much of the rain, wind, and snow that =
comes with this time of year.
=20
I have occasionally recorded vagrants in the late fall. If =
hurricane-driven vagrants are any example, birds will try to go =
=E2=80=9Cback home=E2=80=9D or to their intended destination. I would =
not assume that our recent rare warblers, vireos, sparrows, and =
hummingbirds have succumbed when they disappear but have, hopefully, =
built up some fat reserves and are continuing their journey.
=20
John
=20
From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Carmel Smith
Sent: November-03-16 09:21
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Nocturnal Migration for the 4th Week of October
=20
Thanks John, and Lance, for adding to the knowledge base on migration. =
It's an amazing phenomenon, and the more we know the better.=20
One last question occurs to me, hearing the recent reports of all the =
vagrants, including not a few rare-for-this-area warblers:=20
=20
Do any of these make their way "back home?"=20
=20
And, John, when do you make your last Nocturnal Migration report?=20
=20
These misdirected birds do get observed by birders over a period of =
time, and often stay where they landed until suddenly they are no longer =
there, presumably perished through cold/lack of food or from predators. =
A few, particularly seed-eaters, can make it through at feeders.
But it does occur to me to ask now if there is any nocturnal monitoring =
going on late into the Fall, and if some of these don't find their way =
to a more forgiving climate before the snow flies? Would a lone bird =
leave and strike out across the water so late in the year? Would it call =
as they do in groups?
Thanks for your patience in indulging my curiosity!
Carmel Smith
Midville Branch, NS
=20
=20
On Wednesday, November 2, 2016 12:00 PM, "Laviolette, Lance" < =
<mailto:lance.laviolette@lmco.com> lance.laviolette@lmco.com> wrote:
=20
Hi Carmel and others interested in bird migration in Nova Scotia,
I can add a bit to John=E2=80=99s excellent information.
As John has written, bird migration has been shown to be weather related =
and sporadic. In the fall the biggest peaks usually correspond to the =
passage of a cold front and winds from the northwest. There are usually =
a small to moderate number of pulses of migration through the season.
As the season progresses the species that the peaks are composed of =
change. The data that John sent out to us illustrate this change through =
the migration season very nicely. Here are his top five species during =
the weeks he detected peaks this year:
4th Week of August
American Redstart
Common Yellowthroat
Northern Parula
Black-and-White Warbler
Magnolia Warbler
2nd Week of September
Northern Parula
Common Yellowthroat
Blackpoll Warbler
Black-throated Green Warbler
Magnolia Warbler
4th Week of September
Common Yellowthroat
Savannah Sparrow
White-throated Sparrow
Lincoln's/Swamp Sparrow
Yellow-rumped Warbler
Warblers dominate in the first part of the season and for the most part, =
sparrows dominate later. This is a similar result to what other studies =
have found and what Nova Scotia birders are very familiar with.
To fill in more of the picture, flycatchers move through mid to late =
August, Blackpoll and Palm Warblers move in late September and kinglets, =
chickadees, Dark-eyed Juncos, Blue Jays and American Robin movements =
peak in October.
There will of course be some shifting of the timing depending on if =
you=E2=80=99re located up where Fritz is in Cape Breton or where Alix is =
in Pubnico.
All the best,
Lance
Lance Laviolette
Glen Robertson, Ontario
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nguage:EN-US'>My continued nocturnal monitoring will depend on the =
weather. A microphone cannot withstand too much o