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Hi Keith,
I believe (perhaps John K. can add radar observations) that there may be th=
ree strategies used by birds arriving in Nova Scotia in the spring. One str=
ategy is to cross the Gulf of Maine to southern Nova Scotia and move north =
from there. The second is to cross from New Brunswick to Nova Scotia in the=
north, across the isthmus and head east and southwest from there. The thir=
d would be to cross from New Brunswick to Nova Scotia, crossing the Bay of =
Fundy.
Choosing this last strategy may result in birds flying directly to their br=
eeding areas and explain why in some years some species seem to get mostly =
missed by coastal observers.
Some species may use one strategy versus others but many species probably u=
se a combination depending on weather etc.
Blue-headed Vireos may enter Nova Scotia using mostly the second or third s=
trategy in which case they would arrive in the southern end of the province=
later than elsewhere.
I'd be interested to see what the median arrival date of Blue-headed Vireos=
by Nova Scotia county is in the eBird historical data.
All the best,
Lance
Lance Laviolette
Glen Robertson, Ontario
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
On Behalf Of Keith Lowe
Sent: Tuesday, April 25, 2017 8:57 AM
To: naturens@chebucto.ns.ca
Subject: EXTERNAL: RE: [NatureNS] FOY Blue-headed Vireo - Somerset NS
Thinking about it, most warblers and vireos must cross the ocean from New E=
ngland because they are often reported first in the Digby/Yarmouth/Shelburn=
e. But then why does it take so long for us to get Blue-headed Vireo consid=
ering they are already further north in Maine than those counties?
Keith
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s 10
From: Keith Lowe<mailto:mythos25@live.com>
Sent: Tuesday, April 25, 2017 9:50 AM
To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca>
Subject: RE: [NatureNS] FOY Blue-headed Vireo - Somerset NS
They are common by May but while April 24 is not unprecedented it is defini=
tely early for Blue-headed Vireo in NS. To date, the earliest accepted eBir=
d report is April 26.
The following link shows the progress of their impending arrival according =
to this month's eBird sightings. You can see that the leading edge of the w=
ave is halfway across Maine now
http://ebird.org/ebird/map/buhvir?neg=3Dtrue&env.minX=3D&env.minY=3D&env.ma=
xX=3D&env.maxY=3D&zh=3Dfalse&gp=3Dfalse&ev=3DZ&mr=3Don&bmo=3D4&emo=3D4&yr=
=3Dcur&byr=3D2017&eyr=3D2017
I wish we had a resource that would tell us which species will cross the oc=
ean from New England and which will only migrate via NB. But judging by the=
ir scare reports in April and seeing how many are in Maine now I'm guessing=
Blue-headed Vireo come in from NB?
Keith Lowe
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s 10
From: Ron Wilson<mailto:solidago123@gmail.com>
Sent: Monday, April 24, 2017 9:42 PM
To: Nature NS<mailto:naturens@chebucto.ns.ca>
Subject: [NatureNS] FOY Blue-headed Vireo - Somerset NS
Had a Blue-headed Vireo in our little woodlot today. It was feeding in the =
company of a male and female Yellow-rumped Warbler and a Brown Creeper.
Entered the report on E-bird and it said that Blue-headed Vireo was conside=
red rare for this location and date. That kind of surprised me as I've had =
them here before May 17, 2014 and a pair on May 08, 2016. It must have been=
the relatively early date that sent up the alert.
Ron Wilson
Somerset NS
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<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:EN=
-US">Hi Keith,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:EN=
-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:EN=
-US">I believe (perhaps John K. can add radar observations) that there may =
be three strategies used by birds arriving in Nova Scotia in the spring. On=
e strategy is to cross the Gulf of Maine
to southern Nova Scotia and move north from there. The second is to cross =
from New Brunswick to Nova Scotia in the north, across the isthmus and head=
east and southwest from there. The third would be to cross from New Brunsw=
ick to Nova Scotia, crossing the