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ood number of people in the Maritimes working on Blackpoll Mi
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Hi Keith, Rick, Lance, and all,
By the end of May, many neotropical migrants are in a hurry to arrive on
their breeding grounds in Nova Scotia and Newfoundland. Even at this late
date, they seem to wait until they get to downeast Maine or the Passaquoddy
region of New Brunswick to cross to Nova Scotia. At this link,
http://www.thenaturalistsnotebook.com/our-blog/migrating-bird-fallout-on-mac
hias-seal-island, you can see compelling photographs of a fallout 24 May
2011 on Machias Seal Island which is located about a third of the way across
the mouth of the Bay of Fundy, approximately 60 km from the west end of
Brier Island. The photos highlight the critical role of our coastal islands,
headlands, and peninsulas in the survival of birds during their migratory
flights.
John
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca]
On Behalf Of Laviolette, Lance
Sent: April-25-17 11:33
To: naturens@chebucto.ns.ca
Subject: RE: [NatureNS] FOY Blue-headed Vireo - Somerset NS
Hi Keith,
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. One
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 Brunswick to Nova Scotia, crossing the Bay
of Fundy.
Choosing this last strategy may result in birds flying directly to their
breeding 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
use a combination depending on weather etc.
Blue-headed Vireos may enter Nova Scotia using mostly the second or third
strategy 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>
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Keith Lowe
Sent: Tuesday, April 25, 2017 8:57 AM
To: naturens@chebucto.ns.ca <mailto: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
England because they are often reported first in the
Digby/Yarmouth/Shelburne. But then why does it take so long for us to get
Blue-headed Vireo considering they are already further north in Maine than
those counties?
Keith
Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
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
definitely early for Blue-headed Vireo in NS. To date, the earliest accepted
eBird 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
wave is halfway across Maine now
http://ebird.org/ebird/map/buhvir?neg=true
<http://ebird.org/ebird/map/buhvir?neg=true&env.minX=&env.minY=&env.maxX=&en
v.maxY=&zh=false&gp=false&ev=Z&mr=on&bmo=4&emo=4&yr=cur&byr=2017&eyr=2017>
&env.minX=&env.minY=&env.maxX=&env.maxY=&zh=false&gp=false&ev=Z&mr=on&bmo=4&
emo=4&yr=cur&byr=2017&eyr=2017
I wish we had a resource that would tell us which species will cross the
ocean from New England and which will only migrate via NB. But judging by
their 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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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
considered 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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