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ID-FRONTIERS for June 14-20, 2009
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Messages are displayed in the order they were received.
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| Subject | From | Date | Time |
| Re: Arctic Loon perhaps | Jason Rogers | Sun, 14 Jun 2009 | 12:42am |
| Re: Arctic Loon perhaps | Ben Miller | Sun, 14 Jun 2009 | 12:45am |
| Pacific Loon | Bill Hill | Sun, 14 Jun 2009 | 7:36am |
| Birdbooker Report | Ian Paulsen | Sun, 14 Jun 2009 | 10:26am |
| Jh Krueger looked for you on MyLife | Jh Krueger | Sun, 14 Jun 2009 | 5:38pm |
| Mystery Tringa from PA in 1997 | Frank Haas | Mon, 15 Jun 2009 | 5:26am |
| Re: Mystery Tringa from PA in 1997 | Norman D.van Swelm | Mon, 15 Jun 2009 | 7:07am |
| attn. listowner, subscribers - spamming, phishing
using birdwg01 email address | Jim Barton | Mon, 15 Jun 2009 | 8:30am |
| Re: attn. listowner, subscribers - spamming,
phishing using birdwg01 email address | Mike Patterson | Mon, 15 Jun 2009 | 8:46am |
| Re: Mystery Tringa from PA in 1997 | Colin Bradshaw | Mon, 15 Jun 2009 | 9:48am |
| Re: Mystery Tringa from PA in 1997 | Peter Adriaens | Mon, 15 Jun 2009 | 10:28am |
| asymmetrical Lesser Black-backed Gull | Peter Adriaens | Mon, 15 Jun 2009 | 10:39am |
| Mystery Tringa from PA in 1997 - smaller photos | Frank Haas | Mon, 15 Jun 2009 | 12:13pm |
| Re: Mystery Tringa from PA in 1997 - smaller
photos | Norman D.van Swelm | Mon, 15 Jun 2009 | 1:43pm |
| Spring Overshoots | Will Russell | Tue, 16 Jun 2009 | 8:56am |
| Re: Spring Overshoots | Alvaro Jaramillo | Tue, 16 Jun 2009 | 9:16am |
| Re: Spring Overshoots | Robert Wallace | Tue, 16 Jun 2009 | 11:04am |
| Identification of AFRICAN/NORTH AMERICAN ROYAL
TERN | Lee G R Evans | Wed, 17 Jun 2009 | 10:19am |
| skilled birders needed | Donald P. Freiday | Thu, 18 Jun 2009 | 2:15pm |
| Re: Spring Overshoots | Gary Rosenberg | Thu, 18 Jun 2009 | 6:57pm |
| Re: Spring Overshoots | George Armistead | Thu, 18 Jun 2009 | 11:05pm |
| Re: Spring Overshoots | greatgrayowl(AT)AOL.COM | Fri, 19 Jun 2009 | 7:22am |
| Spring Overshoots | Keith Corliss | Fri, 19 Jun 2009 | 7:25am |
| Re: Spring Overshoots | sgmlod(AT)AOL.COM | Fri, 19 Jun 2009 | 8:27am |
| Re: Spring Overshoots | Alan Wormington | Fri, 19 Jun 2009 | 9:59am |
| Spring overshoots. | Michael Richardson | Fri, 19 Jun 2009 | 1:52pm |
| Re: Spring overshoots. | Kevin McGowan | Fri, 19 Jun 2009 | 3:01pm |
| Possible SBBG in Chicago area | =?ISO-8859-1?Q?=3D=3 | Sat, 20 Jun 2009 | 1:21pm |
| Re: Possible SBBG in Chicago area | =?ISO-8859-1?Q?=3D=3 | Sat, 20 Jun 2009 | 2:12pm |
|
To use email addresses replace '(AT)' with '@'.
This is done to confuse the spam 'bots.
|
[ << | >> | ^^ ]
Subject: Re: Arctic Loon perhaps
From: Jason Rogers <hawkowl(AT)HOTMAIL.COM>
Date: 14 Jun 2009 12:42am
Here's a photo of an Arctic Loon in breeding plumage, which differs from the
Moss Landing bird most clearly in bill size and nape color:
http://www.surfbirds.com/media/gallery_photos/20060620060001.jpg
Jason Rogers
hawkowl(AT)hotmail.com
_________________________________________________________________
Attention all humans. We are your photos. Free us.
http://go.microsoft.com/?linkid=9666046
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[ << | >> | ^^ ]
Subject: Re: Arctic Loon perhaps
From: Ben Miller <bamiller(AT)TALK21.COM>
Date: 14 Jun 2009 12:45am
----DELETED multipart/alternative MIME SECTION----
----INCLUDING text/plain MIME SECTION----
Like Julian, I can only see a Pacific Diver here. The flanks - a =
diagnostic feature for Black-throated Diver/Arctic Loon - lack the =
required white flash.
Ben, UK
----- Original Message -----=20
From: Julian Hough=20
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU=20
Sent: Sunday, June 14, 2009 4:18 AM
Subject: Re: [BIRDWG01] Arctic Loon perhaps
Bill,
From the images, do you not feel that the head shape, bill size and =
shape, nape color, flank color and thickness of the neckstripes fit a =
typical Pacific?
What characteristics on this bird do you feel fit Arctic Loon?=20
Best,
Julian Hough,
CT, USA
jrhough1(AT)snet.net
www.naturescapeimages.net
----- Original Message -----=20
From: Bill Hill=20
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU=20
Sent: Saturday, June 13, 2009 10:21 PM
Subject: [BIRDWG01] Arctic Loon perhaps
Rich Stallcup found this loon in the Moss Landing harbor in Central =
California today. He thought it looked good for an Arctic. Several of =
us observed the bird today and found many characteristics we liked. the =
throat is definitely tinged green not purple. There may or may not be =
white on the swimming bird depending on its speed. The pictures =
describe the bird well other than the green tinge which shows up black
Have fun
http://www.birdshotphotography.com/Arctic%20Loon/index.html
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----DELETED text/html MIME SECTION----
----DELETED multipart/alternative MIME SECTION----
[ << | >> | ^^ ]
Subject: Pacific Loon
From: Bill Hill <billhill(AT)REDSHIFT.COM>
Date: 14 Jun 2009 7:36am
This is a multi-part message in MIME format.
----INCLUDING text/plain MIME SECTION----
Thanks to all who commented on the Moss Landing bird. I will change the =
page title to Pacific Loon and study the photos some of you were kind =
enough to submit.=20
Always something to learn
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[ << | >> | ^^ ]
Subject: Birdbooker Report
From: Ian Paulsen <birdbooker(AT)ZIPCON.NET>
Date: 14 Jun 2009 10:26am
HI ALL:
In this week's Birdbooker Report:
http://scienceblogs.com/grrlscientist/2009/06/birdbooker_report_70.php
I write about two new field guides that might be of interest.
sincerely
--
Ian Paulsen
Bainbridge Island, WA, USA
" Which just goes to show that a
passion for books is extremely unhealthy."
from Cornelia Funke's "Inkheart".
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Subject: Jh Krueger looked for you on MyLife
From: Jh Krueger <jhkrueger(AT)GMAIL.COM>
Date: 14 Jun 2009 5:38pm
----INCLUDING text/plain MIME SECTION----
Jh Krueger added you as a friend on MyLife(TM).
Please confirm you know Jh so we can connect you.
=09=09
Do You Know Jh?
=09=09YES - Connect with Jh, and see who's searching for you
=09=09http://smtp26.mail.reunion.com:80/track?type=3Dclick&mailingid=3D68900&=
messageid=3D12900&databaseid=3D1238061938&serial=3D1228209694&emailid=3Dbirdw=
g01(AT)listserv.arizona.edu&userid=3D65600&extra=3D&&&2002&&&http://www.mylife.c=
om/showInviteRegistration.do?uid=3D362359246&invitee=3Dbirdwg01(AT)listserv.ariz=
ona.edu
=09=09NO - I don't know Jh http://smtp26.mail.reunion.com:80/track?type=3Dcli=
ck&mailingid=3D68900&messageid=3D12900&databaseid=3D1238061938&serial=3D12282=
09694&emailid=3Dbirdwg01(AT)listserv.arizona.edu&userid=3D65600&extra=3D&&&2000&=
&&http://www.mylife.com/showInviteRegistration.do?unsub=3Dtrue&invitee=3Dbird=
wg01(AT)listserv.arizona.edu&uid=3D362359246
=09=09~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=09=09MyLife - Find everyone. All in one place.(TM)=20
=09=09You have received this email because a MyLife member sent an invitation=
to
=09=09this email address. For assistance, please refer to our FAQ or Contact =
Us:
http://smtp26.mail.reunion.com:80/track?type=3Dclick&mailingi=
d=3D68900&messageid=3D12900&databaseid=3D1238061938&serial=3D1228209694&email=
id=3Dbirdwg01(AT)listserv.arizona.edu&userid=3D65600&extra=3D&&&2001&&&http://he=
lp.mylife.com/
=09=09Our Address: 2118 Wilshire Blvd., Box 1008, Santa Monica, CA 90403-5784=
Copyright (c) 2009 MyLife.com, Inc. All Rights Reserved.
=09
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Subject: Mystery Tringa from PA in 1997
From: Frank Haas <fbhaas(AT)PTD.NET>
Date: 15 Jun 2009 5:26am
In November 1997, a short-legged Tringa was seen at Springton
Reservoir, Delaware County, Pennsylvania. It was with Lesser
Yellowlegs and had noticeably shorter legs. Some observers thought it
was a Wood Sandpiper, others thought it was just a "runt" Lesser
Yellowlegs. Viewing conditions were not ideal, and, at least when I
was viewing it, it stayed way out on an overcast drizzly day.
I have put my photos up on a web page for all to see and comment. As
far as I know these are the only photos of this bird.
Here is the link.
http://www.franklinhaas.com/Tringa/TringaMain.html
or got to http://www.franklinhaas.com/ and click on Mystery Tringa.
Any and all comments are welcome.
Frank
PS: Those interested in Aleutian birds may want to peruse my Birding
Adak pages.
Frank & Barb Haas fbhaas(AT)ptd.net Churchtown, PA
"Wisdom begins with putting the right name to a thing."
Join or Leave BIRDWG01: http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
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[ << | >> | ^^ ]
Subject: Re: Mystery Tringa from PA in 1997
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 15 Jun 2009 7:07am
The needle thin bill, white rump and lower back i.e. 'sigar', pale grey
plumage remind me of a Marsh Sandpiper Tringa stagnatilis! Did you make
notes of the leg colour? They look blackish.
Norman
Frank Haas writes: > In November 1997, a short-legged Tringa was seen at
Springton
> Reservoir, Delaware County, Pennsylvania. It was with Lesser
> Yellowlegs and had noticeably shorter legs. Some observers thought it
> was a Wood Sandpiper, others thought it was just a "runt" Lesser
> Yellowlegs. Viewing conditions were not ideal, and, at least when I
> was viewing it, it stayed way out on an overcast drizzly day.
>
> I have put my photos up on a web page for all to see and comment. As
> far as I know these are the only photos of this bird.
>
> Here is the link.
>
> http://www.franklinhaas.com/Tringa/TringaMain.html
>
> or got to http://www.franklinhaas.com/ and click on Mystery Tringa.
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[ << | >> | ^^ ]
Subject: attn. listowner, subscribers - spamming, phishing
using birdwg01 email address
From: Jim Barton <redwingatfp1986(AT)COMCAST.NET>
Date: 15 Jun 2009 8:30am
This is a multi-part message in MIME format.
----INCLUDING text/plain MIME SECTION----
Hello. Today I received an email from "JH Krueger" who said he had
looked for me on the site MyLife, without avail. I was invited to reply
using a dropdown box. I didn't.
I don't know this person. The header shows that he sent his message from a
GMail account to wgo1, which then sent the message on to me. Evidently,
"Krueger" has figured out a way to use the list as if it were my personal
email. I would guess he spammed the whole list at once. Much easier than
harvest names and addresses and then sending everyone a separate email
directly.
Wwhen I searched for "Krueger" by going directly to the MyLife site,
rather than through the dropdown box, I received a Firefox warning against
entering.
Listowner: subscribers-- do you want me to forward the email to you?
Yours,
Jim Barton
Cambridge, MA
US and Canadian Coordinator, Proact
protecting birds and their habitats before it's too late
www.proact-campaigns.org
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[ << | >> | ^^ ]
Subject: Re: attn. listowner, subscribers - spamming,
phishing using birdwg01 email address
From: Mike Patterson <celata(AT)PACIFIER.COM>
Date: 15 Jun 2009 8:46am
There are to "social networking" site MyLife.com and Tagged.com that
have the capacity to co-opt address books when a user joins. The
site then automatically sends out invites to every address in the
address book without permission.
This is a recent viral outcome of the whole myspace/facebook phenomenon.
Under no circumstance should you click anything in these email invites.
I know JH Krueger and I'm pretty sure that he clicked a button he
shouldn't have.
Jim Barton wrote:
> Hello. Today I received an email from "JH Krueger" who said he had
> looked for me on the site MyLife, without avail. I was invited to
> reply using a dropdown box. I didn't.
>
> I don't know this person. The header shows that he sent his message
> from a GMail account to wgo1, which then sent the message on to me.
> Evidently, "Krueger" has figured out a way to use the list as if it
> were my personal email. I would guess he spammed the whole list at
> once. Much easier than harvest names and addresses and then sending
> everyone a separate email directly.
>
> Wwhen I searched for "Krueger" by going directly to the MyLife site,
> rather than through the dropdown box, I received a Firefox warning
> against entering.
--
Mike Patterson
Astoria, OR
20 years on the Breeding Bird Survey
http://www.surfbirds.com/blog/northcoastdiaries/11323
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[ << | >> | ^^ ]
Subject: Re: Mystery Tringa from PA in 1997
From: Colin Bradshaw <drcolin.bradshaw(AT)BTINTERNET.COM>
Date: 15 Jun 2009 9:48am
I don't see this as being Wood Sandpiper at all. The relative proportions of
head/neck/body are all wrong. In addition the facial markings would show
even in these photos. Body/head shape would be better for Marsh Sandpiper
but leg length is all wrong. Proportionately it looks like a lesser
Yellowlegs to me.
Cheers
Colin Bradshaw
-----Original Message-----
From: NBHC ID-FRONTIERS Frontiers of Field Identification
[mailto:BIRDWG01(AT)LISTSERV.ARIZONA.EDU] On Behalf Of Frank Haas
Sent: 15 June 2009 13:26
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Subject: [BIRDWG01] Mystery Tringa from PA in 1997
In November 1997, a short-legged Tringa was seen at Springton
Reservoir, Delaware County, Pennsylvania. It was with Lesser
Yellowlegs and had noticeably shorter legs. Some observers thought it
was a Wood Sandpiper, others thought it was just a "runt" Lesser
Yellowlegs. Viewing conditions were not ideal, and, at least when I
was viewing it, it stayed way out on an overcast drizzly day.
I have put my photos up on a web page for all to see and comment. As
far as I know these are the only photos of this bird.
Here is the link.
http://www.franklinhaas.com/Tringa/TringaMain.html
or got to http://www.franklinhaas.com/ and click on Mystery Tringa.
Any and all comments are welcome.
Frank
PS: Those interested in Aleutian birds may want to peruse my Birding
Adak pages.
Frank & Barb Haas fbhaas(AT)ptd.net Churchtown, PA
"Wisdom begins with putting the right name to a thing."
Join or Leave BIRDWG01:
http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
Archives: http://listserv.arizona.edu/archives/birdwg01.html
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.339 / Virus Database: 270.12.70/2177 - Release Date: 06/15/09
05:54:00
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[ << | >> | ^^ ]
Subject: Re: Mystery Tringa from PA in 1997
From: Peter Adriaens <p_adriaens(AT)YAHOO.COM>
Date: 15 Jun 2009 10:28am
----INCLUDING text/plain MIME SECTION----
Structure, with long wings and long primary projection certainly points to one
of the yellowlegs, rather than any other Tringa.
Kind regards,
Peter
________________________________
-----Original Message-----
From: NBHC ID-FRONTIERS Frontiers of Field Identification
[mailto:BIRDWG01(AT)LISTSERV.ARIZONA.EDU] On Behalf Of Frank Haas
Sent: 15 June 2009 13:26
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Subject: [BIRDWG01] Mystery Tringa from PA in 1997
In November 1997, a short-legged Tringa was seen at Springton
Reservoir, Delaware County, Pennsylvania. It was with Lesser
Yellowlegs and had noticeably shorter legs. Some observers thought it
was a Wood Sandpiper, others thought it was just a "runt" Lesser
Yellowlegs. Viewing conditions were not ideal, and, at least when I
was viewing it, it stayed way out on an overcast drizzly day.
I have put my photos up on a web page for all to see and comment. As
far as I know these are the only photos of this bird.
Here is the link.
http://www.franklinhaas.com/Tringa/TringaMain.html
or got to http://www.franklinhaas.com/ and click on Mystery Tringa.
Any and all comments are welcome.
Frank
PS: Those interested in Aleutian birds may want to peruse my Birding
Adak pages.
Frank & Barb Haas fbhaas(AT)ptd.net Churchtown, PA
"Wisdom begins with putting the right name to a thing."
Join or Leave BIRDWG01:
http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
Archives: http://listserv.arizona.edu/archives/birdwg01.html
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.339 / Virus Database: 270.12.70/2177 - Release Date: 06/15/09
05:54:00
Join or Leave BIRDWG01: http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
Archives: http://listserv.arizona.edu/archives/birdwg01.html
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----DELETED text/html MIME SECTION----
[ << | >> | ^^ ]
Subject: asymmetrical Lesser Black-backed Gull
From: Peter Adriaens <p_adriaens(AT)YAHOO.COM>
Date: 15 Jun 2009 10:39am
----INCLUDING text/plain MIME SECTION----
Hello,
some gull spam for a change...
This adult Lesser Black-backed Gull was photographed in Belgium at the beginning
of this month:
http://img151.imageshack.us/img151/9065/lbbgulladzeebruggebelgi.jpg
Its right leg has a much duller colour than its left one. I seem to (vaguely)
remember gulls like this (e.g. LBBGull or Yellow-legged Gull with one pink and
one yellow leg),
but cannot find any references or photographs.
Does anyone know, or does anyone have an explanation for this asymmetry ?
Thanks,
Peter
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----DELETED text/html MIME SECTION----
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Subject: Mystery Tringa from PA in 1997 - smaller photos
From: Frank Haas <fbhaas(AT)PTD.NET>
Date: 15 Jun 2009 12:13pm
After several suggestions (complaints?), I have loaded cropped photos
to my website.
These will download a lot faster.
http://www.franklinhaas.com/Tringa/TringaMain.html
Frank
Frank & Barb Haas fbhaas(AT)ptd.net Churchtown, PA
"Wisdom begins with putting the right name to a thing."
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[ << | >> | ^^ ]
Subject: Re: Mystery Tringa from PA in 1997 - smaller
photos
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 15 Jun 2009 1:43pm
Frank Haas> "Wisdom begins with putting the right name to a thing."<
much better, Colin Bradshaw is right, it is not a Marsh Sandpiper, more
likely a Lesser Yellow-leg with very muddy legs!
Cheers, Norman
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[ << | >> | ^^ ]
Subject: Spring Overshoots
From: Will Russell <willrussell(AT)COMCAST.NET>
Date: 16 Jun 2009 8:56am
"Spring Overshoots," are a well-known migration phenomenon, perhaps
especially in eastern North America, resulting in species appearing north of
– in some cases far north of – their normal range. These birds tend to
appear more or less at the same time that their species is arriving in its
normal range, and they tend to be largely (overwhelmingly?) second year
males. It isn’t clear if these birds just don’t know when to stop or if
they travel north for the right period of time but for some reason go
faster.
I’m curious if “spring overshoots” as defined above are noticed in western
North America. I’m curious too if spring overshoots in western Europe are
predominately second year males (in those cases where sex can be
determined).
If anyone is kind enough to respond, please do so directly to me unless you
feel your comments are of general interest.
Thanks.
Will Russell
willrussell(AT)comcast.net
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[ << | >> | ^^ ]
Subject: Re: Spring Overshoots
From: Alvaro Jaramillo <chucao(AT)COASTSIDE.NET>
Date: 16 Jun 2009 9:16am
Will
I will direct this to the group in general to get more conversation on it.
In North America it seems to me that the western migration system and the
eastern migration system are entirely different, not only in their geography
and topography, but in their timing and character as well. One of the main
differences in the west is that the landscape does not become available to
birds in as large a scale as in the east, it becomes available in a patchy
manner. So valleys open up earlier than mountain tops, and great corridors
for migration such as the Sierra in California are only usable in the fall
for example. In the West we have a huge latitudinal breeding range for many
birds, Wilson's Warbler is a good example, and with that bird the migration
through my region can start in March and be ongoing into May, while in the
east Wilson's Warbler go through a much shorter time in a distinct pulse. We
just don't have those pulses in the far west. In the west Wilson's leapfrog
over each other, with northern wintering birds settling in first to southern
breeding areas, and the northern breeders being the last to come in from the
southernmost wintering areas (this is known from stable isotope work). I
think that birds in the west use very short hops, not long flights like
eastern birds. The overall slower and more methodical picking of their way
through the available corridors in a sea of snow covered mountains in spring
makes for behavior such as overshooting to be rare. I don't think that
western birds catch a real good wind or system in the way that eastern birds
and ride it to wherever it takes them and then re-position after the fact;
that could land you in a real bad place in the West.
Cheers,
Alvaro
Alvaro Jaramillo
chucao(AT)coastside.net
Half Moon Bay, California
Field Guides - Birding Tours Worldwide
www.fieldguides.com
-----Original Message-----
From: NBHC ID-FRONTIERS Frontiers of Field Identification
[mailto:BIRDWG01(AT)LISTSERV.ARIZONA.EDU] On Behalf Of Will Russell
Sent: Tuesday, June 16, 2009 8:57 AM
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Subject: [BIRDWG01] Spring Overshoots
"Spring Overshoots," are a well-known migration phenomenon, perhaps
especially in eastern North America, resulting in species appearing north of
– in some cases far north of – their normal range. These birds tend to
appear more or less at the same time that their species is arriving in its
normal range, and they tend to be largely (overwhelmingly?) second year
males. It isn’t clear if these birds just don’t know when to stop or if
they travel north for the right period of time but for some reason go
faster.
I’m curious if “spring overshoots” as defined above are noticed in western
North America. I’m curious too if spring overshoots in western Europe are
predominately second year males (in those cases where sex can be
determined).
If anyone is kind enough to respond, please do so directly to me unless you
feel your comments are of general interest.
Thanks.
Will Russell
willrussell(AT)comcast.net
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Subject: Re: Spring Overshoots
From: Robert Wallace <chnuts(AT)YAHOO.COM>
Date: 16 Jun 2009 11:04am
----INCLUDING text/plain MIME SECTION----
Hi Al, Will - it seems reasonable that weather systems in the east are larg=
ely responsible for overshoots, because of the shape of the cold fronts tha=
t create strong SW to NE flowing winds along the frontal barrier - most fro=
nts move from the center of the continent towards the SE in this manner and=
it is quite rational that birds aloft could be moved great distances to th=
e north by these sometimes very strong SW winds. This is a fairly common e=
vent in spring, and has been probably been a factor in the evolution of mig=
ratory patterns. If stronger fronts come earlier in the year, perhaps this=
may also explain the appearance of younger males, coming earlier to locate=
territories.=0A=0AMore confounding are austral overshoots, which have to c=
ross the equator, such as Fork-tailed Flycatcher, and possibly others such =
as the Southern Lapwings that have appeared in late spring several times re=
cently in the east. Is this also weather related, or a different causal fa=
ctor? Is there a genetic predisposition for younger birds to wander, or so=
me other explanation other than wind? Are there similar patterns in southe=
rn African migrants that end up in Europe on a regular basis?=0A=0ABob Wall=
ace=0AAlachua FL=0A=0A=0A=0A=0A________________________________=0AFrom: Alv=
aro Jaramillo <chucao(AT)COASTSIDE.NET>=0ATo: BIRDWG01(AT)LISTSERV.ARIZONA.EDU=0A=
Sent: Tuesday, June 16, 2009 12:16:05 PM=0ASubject: Re: [BIRDWG01] Spring O=
vershoots=0A=0AWill=0A=0A I will direct this to the group in general to ge=
t more conversation on it.=0AIn North America it seems to me that the weste=
rn migration system and the=0Aeastern migration system are entirely differe=
nt, not only in their geography=0Aand topography, but in their timing and c=
haracter as well. One of the main=0Adifferences in the west is that the lan=
dscape does not become available to=0Abirds in as large a scale as in the e=
ast, it becomes available in a patchy=0Amanner. So valleys open up earlier =
than mountain tops, and great corridors=0Afor migration such as the Sierra =
in California are only usable in the fall=0Afor example. In the West we hav=
e a huge latitudinal breeding range for many=0Abirds, Wilson's Warbler is a=
good example, and with that bird the migration=0Athrough my region can sta=
rt in March and be ongoing into May, while in the=0Aeast Wilson's Warbler g=
o through a much shorter time in a distinct pulse. We=0Ajust don't have tho=
se pulses in the far west. In the west Wilson's leapfrog=0Aover each other,=
with northern wintering birds settling in first to southern=0Abreeding are=
as, and the northern breeders being the last to come in from the=0Asouthern=
most wintering areas (this is known from stable isotope work). I=0Athink th=
at birds in the west use very short hops, not long flights like=0Aeastern b=
irds. The overall slower and more methodical picking of their way=0Athrough=
the available corridors in a sea of snow covered mountains in spring=0Amak=
es for behavior such as overshooting to be rare. I don't think that=0Aweste=
rn birds catch a real good wind or system in the way that eastern birds=0Aa=
nd ride it to wherever it takes them and then re-position after the fact;=
=0Athat could land you in a real bad place in the West. =0A =0ACheers, =
=0A=0AAlvaro=0A=0AAlvaro Jaramillo=0Achucao(AT)coastside.net=0AHalf Moon Bay, =
California=0A=0AField Guides - Birding Tours Worldwide=0Awww.fieldguides.co=
m=0A=0A-----Original Message-----=0AFrom: NBHC ID-FRONTIERS Frontiers of Fi=
eld Identification=0A[mailto:BIRDWG01(AT)LISTSERV.ARIZONA.EDU] On Behalf Of Wi=
ll Russell=0ASent: Tuesday, June 16, 2009 8:57 AM=0ATo: BIRDWG01@LISTSERV.A=
RIZONA.EDU=0ASubject: [BIRDWG01] Spring Overshoots=0A=0A"Spring Overshoots,=
" are a well-known migration phenomenon, perhaps=0Aespecially in eastern No=
rth America, resulting in species appearing north of=0A=E2=80=93 in some ca=
ses far north of =E2=80=93 their normal range. These birds tend to=0Aappea=
r more or less at the same time that their species is arriving in its=0Anor=
mal range, and they tend to be largely (overwhelmingly?) second year=0Amale=
s. It isn=E2=80=99t clear if these birds just don=E2=80=99t know when to s=
top or if=0Athey travel north for the right period of time but for some rea=
son go=0Afaster.=0A=0AI=E2=80=99m curious if =E2=80=9Cspring overshoots=E2=
=80=9D as defined above are noticed in western=0ANorth America. I=E2=80=99=
m curious too if spring overshoots in western Europe are=0Apredominately se=
cond year males (in those cases where sex can be=0Adetermined).=0A=0AIf any=
one is kind enough to respond, please do so directly to me unless you=0Afee=
l your comments are of general interest.=0A=0AThanks.=0A=0AWill Russell=0Aw=
illrussell(AT)comcast.net=0A =0A=0A=0AJoin or Leave BIRDWG01:=0Ahttp://listser=
v.arizona.edu/cgi-bin/wa?SUBED1=3Dbirdwg01=0A=0AArchives: http://listserv.a=
rizona.edu/archives/birdwg01.html=0A=0A=0AJoin or Leave BIRDWG01: http://li=
stserv.arizona.edu/cgi-bin/wa?SUBED1=3Dbirdwg01=0A=0AArchives: http://lists=
erv.arizona.edu/archives/birdwg01.html=0A
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Subject: Identification of AFRICAN/NORTH AMERICAN ROYAL
TERN
From: Lee G R Evans <LGREUK400(AT)AOL.COM>
Date: 17 Jun 2009 10:19am
----INCLUDING text/plain MIME SECTION----
Once again, I am soliciting information from those of you who may be amply
qualified to comment
If you browse my UK400 Club Rare Bird Alert for recent days, you will come
across a superb selection of flight images of a 'Royal Tern' photographed
by Michael O'Keefe in County Cork, IRELAND, on 9 June. This bird was
subsequently relocated in North Wales on 15 June.
See _http://uk400clubrarebirdalert.blogspot.com_
(http://uk400clubrarebirdalert.blogspot.com/)
After studying Mike's images, I formed an opinion that the bird was a ROYAL
TERN of the form albididorsalis, which I recognise as 'AFRICAN ROYAL TERN'
and have studied on occasions in Dahkla Bay, Western Sahara (including as
recently as May this year).
The bird (on 9 June) was in full breeding plumage and as such has the black
crown to the bill base and a summer-coloured bill - in this case yellow
with a cast of orange. Furthermore, from Mike's stunning images, one can
clearly detect just four black outer primary shafts. These features, in my
opinion, point towards the bird being of West African rather than North
American origin.
In my experience, the majority of 'AMERICAN ROYAL TERNS' (nominate form
maxima) have a rich ORANGE coloured bill, often with almost a hint of a
reddish cast, and rarely appear 'yellow' in the field (please email me if your
experience with maxima contradicts this). Furthermore, adult maxima acquire a
summer hood from late February/early March and begin moulting the black on
the crown within a very short period indeed and often by early June, a
greater percentage of birds have a white forehead (I accept however that it is
more likely a non-breeder will retain these feathers).
The differencies in bill shape are marginal and very subtle but African
Royal averages slimmer, with a less well-marked gonydeal angle, but overall
has greater thickness over its congeners, namely the similar Lesser Crested
and Elegant Terns. The upperparts are generally paler and the tail fork
generally shallower but these features are not easily transcribed from the
images.
Additionally, the Cork bird has four dark primary shafts apparent. Should
American Royal not show 6-9 dark outers at this time of year?
I would be most grateful for any input on what is now becoming a
contentious identification.
Lee G R Evans
British Birding Association
UK400 Club, Rare Birds Magazine, Ornithological Consultant and
Conservationist
Discussion Forum/Email Group: _http://groups.yahoo.com/group/UK400Club/_
(http://groups.yahoo.com/group/UK400Club/)
Rare Bird Alert:
_http://groups.yahoo.com/group/RareBirdAlertforBritainandIreland_UK400ClubBBA/_
(http://groups.yahoo.com/group/RareBirdA
lertforBritainandIreland_UK400ClubBBA/)
Email Address: LGREUK400(AT)aol.com
Website Address: _www.uk400clubonline.co.uk_
(http://www.uk400clubonline.co.uk/)
Blog Sites: _http://uk400clubrarebirdalert.blogspot.com/_
(http://uk400clubrarebirdalert.blogspot.com/) _
http://birdingamersham.blogspot.com/_
(http://birdingamersham.blogspot.com/) _
http://birdingtringreservoirs.blogspot.com/_
(http://birdingtringreservoirs.blogspot.com/)
_http://calvertbirding.blogspot.com/_ (http://calvertbirding.blogspot.com/)
Chaffinch House
8 Sandycroft Road
Little Chalfont
Amersham
Buckinghamshire
England
HP6 6QL
Telephones: 01494 763010 and 01494 581157
Mobile/Text Alerts: 07881 906629
(Lee Evans Enterprises incorporate documentation of rare bird occurrences
in Britain & Ireland and elsewhere in the Western Palearctic and in North
America; Rare Bird Information and Rare Bird Alerts; Rare Birds Magazine and
other related publications; Bird Tours for Birders)
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Subject: skilled birders needed
From: "Donald P. Freiday" <don.freiday(AT)NJAUDUBON.ORG>
Date: 18 Jun 2009 2:15pm
This is a multi-part message in MIME format.
----INCLUDING text/plain MIME SECTION----
Because a high degree of birding skill is required for the following
positions, I requested and was granted permission from the list owner to
post the following to this list:
New Jersey Audubon Society's Cape May Bird Observatory is hiring counters
for fall 2009 for the Cape May Morning Flight count (migrant passerines,
identified and counted in flight), Avalon Sea Watch, and Cape May Hawk
Watch. Morning Flight averages 280,000 birds per season, Sea Watch about
700,000, and the Hawk Watch about 50,000. Housing and a stipend are
provided. More information & how to apply can be found at
http://www.njaudubon.org/AboutNJAS/Employ.html
--------------------------------------------------
Donald P. Freiday
Director of Birding Programs
New Jersey Audubon Society's
Cape May Bird Observatory
600 Route 47 North
Cape May Court House, NJ 08210
(609) 861-0700 voice
(609) 861-1651 fax
don.freiday(AT)njaudubon.org
www.birdcapemay.org
www.njaudubon.org
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Subject: Re: Spring Overshoots
From: Gary Rosenberg <ghrosenberg(AT)COMCAST.NET>
Date: 18 Jun 2009 6:57pm
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Hi all,
I would think that the phenomenon of "Spring Overshoots" can be
attributed to many rarities found in se. Alaska, as well as throughout
mainland Alaska up as far north as Barrow. Drainages that flow to the
west in se. Alaska, such as at Hyder, or along the Stikine River (a
bit farther north) get species such as Cassin's Vireos, and Dusky
Flycatcher (just to name two) in early June, probably about the time
they are arriving in the interior of BC. Species such as Yellow-
bellied Flycatchers that are found in the interior of central Alaska
(west of TOK and near Fairbanks) are birds that have continued
migrating north and west well beyond their normal stopping points in
the Yukon and BC - in fact I witnessed a Yellow-bellied Flycatcher
using the Alaskan Highway as a migratory corridor, with the bird
moving west in continuous flights in early June. The many late spring
records of a whole array of rarities at Barrow, I would think, is also
an example of this phenomenon - and not all these records are of
"eastern" species that have continued north and west, but also include
more "western" migrants such as Swainson's Hawk and Varied Thrush. I
would guess that this is much more widespread in Alaska, as so few
individuals actually have the chance of being located, yet lots are. A
place like Barrow is an obvious concentrating point.
Cheers,
Gary
Gary H. Rosenberg
Tucson, AZ
ghrosenberg(AT)comcast.net
http://www.wingsbirds.com
http://azfo.org/ArizonaBirdCommittee/index.html
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Subject: Re: Spring Overshoots
From: George Armistead <armistead.george(AT)GMAIL.COM>
Date: 18 Jun 2009 11:05pm
Can't add much re: western Spring overshooting I'm afraid, but in
response to Bob's comments on eastern spring overshoots, surely
weather is but one factor. In some cases it may be the sole factor,
but in others it's prob only a contributing factor at best. For
eastern birds reaching strange corners of Alaska other things are
surely afoot. I'm not clear exactly on what spurs a bird's instinct to
migrate (hormone levels?), but I'd think as Will indicates, odd birds
end up with such strong instincts to migrate that they never actually
stop to attempt breeding; regardless of the weather they encounter.
Re: Austral vagrants to the ABA region, I'd think that only rarely is
weather a causal factor. Mostly those have to be birds with hormonal
imbalances, other maladies causing abnormal migrations, birds
expanding their ranges, or just flukes (whatever those are).
I find it interesting that as Will says, many of these overshoots are
2nd yr males. I guess the natural question is, where did they wander
during that first year, and how did they survive it? I've been meaning
to look at Austral vagrants in this same vein but the records are so
few relatively that the age/sex info is surely all the more sparse.
Off to Barrow tomorrow. The idea of seeing something like a Scarlet
Tanager there just blows my mind.
Best,
-George
--
George L. Armistead
Academy of Natural Sciences of Philadelphia
Philadelphia, PA
armistead.george(AT)gmail.com
Field Guides Inc.
Birding Tours Worldwide
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Subject: Re: Spring Overshoots
From: greatgrayowl(AT)AOL.COM
Date: 19 Jun 2009 7:22am
----INCLUDING text/plain MIME SECTION----
Hi all:
I think that we are, perhaps, confounding two or three=C2=A0(at least) dif=
ferent phenomena when talking about spring overshoots, one of which may be=
restricted in North America=C2=A0to the east coast (due to geography).=C2=
=A0 One of these is the regular occurrence of individuals=C2=A0in spring=
=C2=A0to the north of the regular breeding range of the species.=C2=A0 I=
would suspect that if the distance beyond regular breeding range is not=
too large (whatever 'too large' may mean), individuals may be able to reo=
rient and find their normal place in the world.=C2=A0 Much of my recent ex=
perience of spring migration has been in eastern Colorado, which is actual=
ly a difficult place to assess the occurrence parameters of certain specie=
s/individuals.=C2=A0=C2=A0This is because the area lies to the=C2=A0west=
and north of some parts of the regular breeding range of some eastern spe=
cies, but not north of some other parts.=C2=A0 The various "eastern" speci=
es that breed in the Hill Country in central Texas -- such as Yellow-throa=
ted Vireo -- are a good example.=C2=A0 Is a Yellow-throated Vireo that arr=
ives in eastern Colorado an overshoot to the north=C2=A0or is it displaced=
too far west?=C2=A0 Did a strong southerly blow push the bird too far nor=
th or did it drift too far east on a light southeasterly?=C2=A0 Or, is its=
compass whopper-jawed?=C2=A0 Looking at recent weather patterns may offer=
some clues, but with birds' ability to buck wind direction, we can probab=
ly never know the true cause of any single bird's arrival.
Another phen
omenon that we're considering=C2=A0is of individuals well outside normal=
breeding range to the north, such as Cape May Warbler at Barrow.=C2=A0 Th=
ese occurrences seem to occur at normal migration times or, even, fairly=
late, as if the birds had taken a long time to get there.=C2=A0 I would=
suggest that such records are not due, at least directly, to weather, but=
to innate orientation troubles, though I, too, have pondered George's que=
stion about where such birds were in the intervening winter.
Finally (at least for this essay), the East Coast experiences obviously we=
ather-caused displacements of birds in spring, such as the one that occurr=
ed this spring in New England and, particularly, the Canadian Maritimes.=
=C2=A0 These often occur well before normal spring migration timing at suc=
h latitudes and often include species that wind up far beyond their normal=
breeding range.=C2=A0 These birds are, apparently, entrained in weather=
systems offshore and, like similar occurrences in fall, probably orient=
downwind (to the north) in order to conserve energy in an attempt to run=
into land.
So, I would suggest that we be a bit more careful about willy-nilly lumpin=
g so many different phenomena into one category, as these questions will=
be hard enough to answer without the confusion entailed by such lumping.
Sincerely,
Tony Leukering
Villas, NJ
-----Original Message-----
From: Will Russell <willrussell(AT)COMCAST.NET>
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Sent: Tue, Jun 16, 2009 11:56 am
Subject: [BIRDWG01] Spring Overshoots
"Spring Overshoots,"=3D2
0are a well-known migration phenomenon, perhaps
specially in eastern North America, resulting in species appearing north=
of
in some cases far north of =E2=80=93 their normal range. These birds ten=
d to
ppear more or less at the same time that their species is arriving in its
ormal range, and they tend to be largely (overwhelmingly?) second year
ales. It isn=E2=80=99t clear if these birds just don=E2=80=99t know when=
to stop or if
hey travel north for the right period of time but for some reason go
aster.
I=E2=80=99m curious if =E2=80=9Cspring overshoots=E2=80=9D as defined abov=
e are noticed in western
orth America. I=E2=80=99m curious too if spring overshoots in western Eur=
ope are
redominately second year males (in those cases where sex can be
etermined).
If anyone is kind enough to respond, please do so directly to me unless yo=
u
eel your comments are of general interest.
Thanks.
Will Russell
illrussell(AT)comcast.net
oin or Leave BIRDWG01: http://listserv.arizona.edu/cgi-bin/wa?SUBED1=3Dbir=
dwg01
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Subject: Spring Overshoots
From: Keith Corliss <koolhand(AT)JUNO.COM>
Date: 19 Jun 2009 7:25am
----INCLUDING text/plain MIME SECTION----
An interesting discussion to be sure. =
We may all scratch our collective heads and wonder as to the reason some=
birds "overshoot." But in the end we may never know the truth. And perh=
aps that's a good thing--it's nice to know there are still mysteries out=
there to decipher.
But the very label "overshoot" smells of anthropomorphism. These organis=
ms, as is obvious, don't read books or interpret range maps. It's probab=
le this has been going on since feathers evolved and for a variety of re=
asons--weather, hormones, etc. I'd rather chalk it up to chance-takers, =
those with pioneering genes venturing beyond the "normal" (I hate that w=
ord) range to scout out new opportunities and defy the odds in hopes of =
establishing a new and agreeable nest site. How else do birds expand the=
ir range were it not for the bold among them?
Keith Corliss, West Fargo, ND
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Subject: Re: Spring Overshoots
From: sgmlod(AT)AOL.COM
Date: 19 Jun 2009 8:27am
----INCLUDING text/plain MIME SECTION----
Greetings All
Firstly, I think we need to define spring overshoot.
There really are two different types.
The first type is the kind that shows up a relatively short distance n. of=
their usual range.
The second type shows up hundreds of miles n of the species' usual range.
If second year means birds that are ~1 year old, then by-passing breeding=
range (especially if territories saturated) in search of new breeding gro=
unds makes sense. I guess this could be true for birds ~2 years old, too.=
If these European overshoots really are birds nearing their 2nd birthday,=
I'd really love to see the data; I wonder about statistical significance=
and variation from species to species.
My next question is: are these European spring overshoots short-range or=
long-range?
It has been theorized that long-range spring overshoots are secondary to=
either extraordinary weather events or screwed-up genetics. in the latter=
case, it has been suggested (by Vinicombe and Cottridge, I believe) that=
those birds have lost the "stop" mechanism in their nbound spring migrati=
on (usually birds approx 1 year old, because if this is genetic, they don'=
t see year 2).
In WA we see precious few spring overshoots, but then again, there are ver=
y few medium to long-distance passerine migrants that stop south of here=
(unless one gets all the way down to Arizona/se California; and many of=
these species probably wind up e of WA/OR if they continued north). Costa=
's Humm and Allen's Humm (okay not passerines) are two species one might=
expect to=3D2
0overshoot into WA.. BG Gnat, Cassin's Kingbird, Hooded Oriole are a few=
more.=C2=A0Maybe Virginia's Warbler, Plumbeous Vireo, Cordilleran Fly, GH=
Junco could be added on to this list, but really, most of their range is=
east of WA, not just south. Cordilleran Fly does get into the se corner=
of WA (and GHJU and Virginia's Warbler into se. corner of OR, at least ir=
regularly) as a breeder, but a vagrant Cord Fly would likely pass unnotice=
d. Anyway, Great Basin birds tend to be longer-distance migrants than Pac=
NW birds, and those overshoots would=C2=A0 more likely occur in Montana,=
Idaho,=C2=A0etc ... not in my neck of the woods.
BT Sparrow does regularly "overshoot" into the Pac NW, breeding irregularl=
y, but this has been well tied to drought. I have no idea of age of these=
birds. For BG Gnat, except for short-range overshoots, spring vagrants ar=
e incredibly rare in OR/WA. Hooded Orioles are more regular, but WA still=
has <10 (sorry, don't know age breakdown off-hand. At least a couple appe=
ared to be adult males, but ???). Costa's show up annually, and nearly all=
WA records are spring, but for OR, the records are really pretty scattere=
d year-round. Cassin's Kings don't seem to fly n. of their range into OR/W=
A and Allen's are very, very scarce n. of their range, but some of that ma=
y be due to ID issues. Interestingly, Hermit Warblers (which breed well n.=
into the WA Cascades)=C2=A0are virtually unknown even short distances n.=
of their breeding range, but some of this may be due to poor coverage of=
=3D2
0montane habitats in spring. AT Fly is a species that barely gets into WA,=
and spring records n of its range are quite scarce as well.
So, I guess for the Pac NW, I'd say we have very few spring overshoots, bu=
t there are few species to overshoot (sorry, I know, I am repeating myself=
). Alvaro's reasoning makes much sense, but for WA/OR, there are probaby=
insufficient "candidate" species to use for comparison. The interior west=
ern states may make for a better comparison with the east, as Great Basin=
birds (and even Arizona species like RF Warbler) are more likely to be mi=
gratory, but=C2=A0there=C2=A0one faces a relative low-density of observers=
(and how many overshoots in e. North America are found along Great Lakes=
and Atlantic Coast... the west has little to compare with these for conce=
ntrating effect. Maybe the Front Range).
Alaska=C2=A0(or central/northern BC)=C2=A0would be a better place to asses=
s spring overshoots, as many far western species stop shy of there (eg.,=
Bullock's Oriole, Sage Sparrow).
Now, the occurrence of waterbirds in the Pac NW is more complex and intere=
sting, and then in w WA/OR we have a fascinating pattern of birds from the=
e. side of the Cascades wandering regularly onto the w. side, usually far=
more so in spring than fall. Whether this represents an overshoot phenome=
non or something else deserves some pondering.
Cheers
Steve Mlodinow
-----Original Message-----
From: Will Russell <willrussell(AT)COMCAST.NET>
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Sent: Tue, Jun 16, 2009 8:56 am
Subject: [BIRDWG01]20Spring Overshoots
"Spring Overshoots," are a well-known migration phenomenon, perhaps
specially in eastern North America, resulting in species appearing north=
of
in some cases far north of =E2=80=93 their normal range. These birds ten=
d to
ppear more or less at the same time that their species is arriving in its
ormal range, and they tend to be largely (overwhelmingly?) second year
ales. It isn=E2=80=99t clear if these birds just don=E2=80=99t know when=
to stop or if
hey travel north for the right period of time but for some reason go
aster.
I=E2=80=99m curious if =E2=80=9Cspring overshoots=E2=80=9D as defined abov=
e are noticed in western
orth America. I=E2=80=99m curious too if spring overshoots in western Eur=
ope are
redominately second year males (in those cases where sex can be
etermined).
If anyone is kind enough to respond, please do so directly to me unless yo=
u
eel your comments are of general interest.
Thanks.
Will Russell
illrussell(AT)comcast.net
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Subject: Re: Spring Overshoots
From: Alan Wormington <wormington(AT)JUNO.COM>
Date: 19 Jun 2009 9:59am
Adding to this theme, spring overshoots are not necessarily defined as
birds that are well north of the species "normal" range.
Even within the species' range an individual bird can be a spring
overshoot. For example a Hooded Warbler in Ohio might in fact be a
spring overshoot from Kentucky or Tennessee, even though Ohio is well
within the species "normal" range. Such a bird could easily return to
Kentucky or Tennessee but this type of movement would go unnoticed by the
birding community (but undoubtedly documented occasionally by banding
activities).
Alan Wormington
Leamington, Ontario
On Fri, 19 Jun 2009 10:20:29 -0400 greatgrayowl(AT)AOL.COM writes:
> Hi all:
>
> I think that we are, perhaps, confounding two or three (at least)
> different phenomena when talking about spring overshoots, one of
> which may be restricted in North America to the east coast (due to
> geography). One of these is the regular occurrence of
> individuals in spring to the north of the regular breeding range
> of the species. I would suspect that if the distance beyond
> regular breeding range is not too large (whatever 'too large' may
> mean), individuals may be able to reorient and find their normal
> place in the world. Much of my recent experience of spring
> migration has been in eastern Colorado, which is actually a
> difficult place to assess the occurrence parameters of certain
> species/individuals.  This is because the area lies to the west
> and north of some parts of the regular breeding range of some
> eastern species, but not north of some other parts. The various
> "eastern" species that breed in the Hill Country in central Texas --
> such as Yellow-throated Vireo -- are a good example. Is a
> Yellow-throated Vireo that arrives in eastern Colorado an overshoot
> to the north or is it displaced too far west? Did a strong
> southerly blow push the bird too far north or did it drift too far
> east on a light southeasterly? Or, is its compass whopper-jawed?Â
> Looking at recent weather patterns may offer some clues, but with
> birds' ability to buck wind direction, we can probably never know
> the true cause of any single bird's arrival.
>
> Another phen
> omenon that we're considering is of individuals well outside normal
> breeding range to the north, such as Cape May Warbler at Barrow.Â
> These occurrences seem to occur at normal migration times or, even,
> fairly late, as if the birds had taken a long time to get there. I
> would suggest that such records are not due, at least directly, to
> weather, but to innate orientation troubles, though I, too, have
> pondered George's question about where such birds were in the
> intervening winter.
>
> Finally (at least for this essay), the East Coast experiences
> obviously weather-caused displacements of birds in spring, such as
> the one that occurred this spring in New England and, particularly,
> the Canadian Maritimes. These often occur well before normal
> spring migration timing at such latitudes and often include species
> that wind up far beyond their normal breeding range. These birds
> are, apparently, entrained in weather systems offshore and, like
> similar occurrences in fall, probably orient downwind (to the north)
> in order to conserve energy in an attempt to run into land.
>
> So, I would suggest that we be a bit more careful about willy-nilly
> lumping so many different phenomena into one category, as these
> questions will be hard enough to answer without the confusion
> entailed by such lumping.
>
> Sincerely,
>
> Tony Leukering
> Villas, NJ
>
>
> -----Original Message-----
> From: Will Russell <willrussell(AT)COMCAST.NET>
> To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
> Sent: Tue, Jun 16, 2009 11:56 am
> Subject: [BIRDWG01] Spring Overshoots
>
>
>
> "Spring Overshoots,"=2
> 0are a well-known migration phenomenon, perhaps
> specially in eastern North America, resulting in species appearing
> north of
> in some cases far north of – their normal range. These birds
> tend to
> ppear more or less at the same time that their species is arriving
> in its
> ormal range, and they tend to be largely (overwhelmingly?) second
> year
> ales. It isn’t clear if these birds just don’t know when to
> stop or if
> hey travel north for the right period of time but for some reason go
> aster.
> I’m curious if “spring overshoots” as defined above are
> noticed in western
> orth America. I’m curious too if spring overshoots in western
> Europe are
> redominately second year males (in those cases where sex can be
> etermined).
> If anyone is kind enough to respond, please do so directly to me
> unless you
> eel your comments are of general interest.
> Thanks.
> Will Russell
> illrussell(AT)comcast.net
>
>
> oin or Leave BIRDWG01:
> http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
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>
>
>
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>
"The Early Worm Gets The Bird!"
--- Alan Wormington
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Subject: Spring overshoots.
From: Michael Richardson <mrtree(AT)KOS.NET>
Date: 19 Jun 2009 1:52pm
I wonder if one idea of spring overshoots is birds attempting to extended
their range north. Perhaps this has been mentioned, hope I am not
repeating.
In Ontario there are a number of species extending their range. Even if
climate change is implicated there must be some prospecting going on as
individuals find new nesting grounds. Second year males make sense as
they are naturally looking for a territory of their own and may be at some
advantage if they explore a little further afield (but not too much). On
the north shore of lake Ontario we see Cardinals which moved in during the
early to mid 1900s, mockingbirds and Red-bellied WOodpeckers coming around
either end of the lake and Hooded Warblers which have moved onto the Rice
Lake Sandplains relatively recently. These have all moved in relatively
small steps but often appear as overshoots.
Prothontary Warblers occur in the Rochester area but are not known from 60
or 70 miles north on the north shore of Lake Ontario. Occasionally a bird
will be seen in Spring likely as an overshoot. I am not sure Prothontary
will start breeding here (though I hope) but there may be prospecting.
Michael
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Subject: Re: Spring overshoots.
From: Kevin McGowan <kjm2(AT)CORNELL.EDU>
Date: 19 Jun 2009 3:01pm
At 04:52 PM 6/19/2009, Michael Richardson wrote:
>...
>
>In Ontario there are a number of species extending their range. Even if
>climate change is implicated there must be some prospecting going on as
>individuals find new nesting grounds. ...
I co-authored a paper on this topic 17 years ago(!!) about Fish Crows
(http://www.birds.cornell.edu/crows/kjmpubs.html). I probably haven't read
the paper for about 10 years, but I looked it over tonight. It does
discuss some interesting points about the possible methods of range
expansion, including the possible role of things like spring overshoots. I
am particularly happy about the last sentence predicting the utility of
breeding bird atlases in documenting range expansions. Both of the
recently published atlases in Ontario and New York show abundant evidence
of creeping range expansion, as well as a few examples of leapfrog expansion.
Kevin
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Subject: Possible SBBG in Chicago area
From: =?ISO-8859-1?Q?=3D=3FISO-8859-1=3FQ=3FGreg=5FNeise=3F=3D?= <gregneise(AT)ILBIRDS.COM>
Date: 20 Jun 2009 1:21pm
Hi all,
Tom Lally photographed a bird at North Point Marina (at the WI/IL border)
that looks very similar to fig. 30.12 on page 215 of Howell & Dunn.
I would very much appreciate it if people on this list having experience in
SBBG...especially in this plumage...would give an opinion on this bird:
http://www.ilbirds.com/index.php?topic=23099.0
Cheers,
-greg neise
Berwyn, IL
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Subject: Re: Possible SBBG in Chicago area
From: =?ISO-8859-1?Q?=3D=3FISO-8859-1=3FQ=3FGreg=5FNeise=3F=3D?= <gregneise(AT)ILBIRDS.COM>
Date: 20 Jun 2009 2:12pm
That would of course be SBGU (for Slaty-backed Gull).
I am such a spaz sometimes.
-greg
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