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ID-FRONTIERS for November 26-30, 2006
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Messages are displayed in the order they were received.
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| Subject | From | Date | Time |
| Small Goose ID | Bob Moul | Sun, 26 Nov 2006 | 6:30am |
| Re: Gulls, general aging question | Peter Wilkinson | Sun, 26 Nov 2006 | 11:25am |
| Re: Unidentified Jaeger | =?iso-8859-1?Q?Pierr | Mon, 27 Nov 2006 | 2:46am |
| Goose ID | Bob Moul | Mon, 27 Nov 2006 | 1:02pm |
| More large gulls to ponder | Martin Reid | Tue, 28 Nov 2006 | 8:32am |
| Danish - Black Tern ssp. ?? | Kenneth Rude Nielsen | Tue, 28 Nov 2006 | 2:10pm |
| Re: Danish - Black Tern ssp. ?? | Martin Reid | Tue, 28 Nov 2006 | 2:49pm |
| Re: [cobirds] Interesting pale gull at McIntosh
Res (Longmont, CO) | Martin Reid | Tue, 28 Nov 2006 | 3:25pm |
| Sexing Short-eared Owls in the field | Wayne C. Weber | Tue, 28 Nov 2006 | 3:45pm |
| Fw: Danish - Black Tern ssp. ?? | Norman D.van Swelm | Tue, 28 Nov 2006 | 4:03pm |
| accentor identification | Norman D.van Swelm | Tue, 28 Nov 2006 | 4:15pm |
| Re: Danish - Black Tern ssp. ?? | James P. Smith | Wed, 29 Nov 2006 | 7:47am |
| Re: accentor identification | Lee Evans | Wed, 29 Nov 2006 | 9:08am |
| Fw: [EBN] Fw: BIRDWG01 greek listserv | Norman D.van Swelm | Thu, 30 Nov 2006 | 5:08am |
| Re: accentor identification | Norman D.van Swelm | Thu, 30 Nov 2006 | 8:10am |
| Re: Danish - Black Tern ssp. ?? | Kenneth Rude Nielsen | Thu, 30 Nov 2006 | 10:35am |
| Re: Danish - Black Tern ssp. ?? | Lee Evans | Thu, 30 Nov 2006 | 11:33am |
| Re: Danish - Black Tern ssp. ?? | Lethaby, Nick | Thu, 30 Nov 2006 | 12:11pm |
|
To use email addresses replace '(AT)' with '@'.
This is done to confuse the spam 'bots.
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Subject: Small Goose ID
From: Bob Moul <AMPipit(AT)COMCAST.NET>
Date: 26 Nov 2006 6:30am
Fellow Birders,
On 11/21/2006, I found and photographed this very noticeably
small goose on a creek here in Adams County, South Central
Pennsylvania. An ongoing discussion on the PABirds list
still leaves the ID very much in doubt. I won't post any
details of the opinions offered thus far, hoping a fresh
look by this list's members might shed some new light on a
more positive ID. The photos at the attached link will show
the diminutive size of this goose (very near that of a
Mallard when viewed side by side) also the head shape and
bill length. I am not too sure the coloration of the goose
can be used here for identification due to poor lighting
that morning. However, it can be compared to the normal
Canada's in the photos.
http://www.pbase.com/rcm1840/cacklinggoose
Any input would be gratefully appreciated.
--
Good Birding,
Bob
Bob Moul (AMPipit(AT)comcast.net)
Adams County, PA USA
Canon EOS20D/300mm f/4 IS/1.4IIX
"PROTECTING NATURE THROUGH EDUCATION"
Photo Galleries:
http://www.pbase.com/rcm1840
http://bob.moul.oiseaux.net/index.en.html
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Subject: Re: Gulls, general aging question
From: Peter Wilkinson <pjw42(AT)WAITROSE.COM>
Date: 26 Nov 2006 11:25am
Matt Sharp wrote:
"Does anyone on the list have a strong opinion
or know of any research showing whether bare
part coloration or plumage pattern are better indicators
of age in gulls?"
I know a single bird is not a good sample, but the following true story may
amuse.
Some friends had a Lesser Black-backed Gull that visited their garden every
winter. The bird had them well trained - they watched out for its arrival,
usually October-ish, and then provided food every day until it left at the
end of March or beginning of April. One autumn, in the early 1990s, we
caught and ringed it. It was in full adult plumage but the bill, instead of
having the nice red spot one might expect, had a dull blackish smudge and
the legs were a dull grey with occasionally a greenish tinge rather than
yellow. Referring to my Grant, I told my friends that this could not be the
bird that had been visiting the garden for some years in adult plumage, but
must be a fourth year bird and would come back with full adult bare parts
the next year, if indeed it came back at all. Wrong! It did come back for
the next eight years or so (and now we knew it was the same bird as we could
read the ring number through a telescope) but its bare part colours never
changed, and that in a bird that had to be a good twelve or so years old and
was probably more like sixteen.
Peter Wilkinson
Wheathampstead, Herts, England
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Subject: Re: Unidentified Jaeger
From: =?iso-8859-1?Q?Pierre-Andr=E9_CROCHET?= <pierre-andre.crochet(AT)CEFE.CNRS.FR>
Date: 27 Nov 2006 2:46am
Re my comments on the recent long-tailed skua / jaeger : Benoit Paepegaey, who
knows these birds much better than me, commented privately to me that the type
of pattern shown by the bird is indeed diagnostic for long-tailed as long as it
is associated with a cold / grey coloration. Juv Artic skuas can show a similar
pattern (rarely) but then the birds are pale birds with a yellowish coloration
very different from the long-tailed skua coloration.
Pierre
Pierre-André Crochet
CNRS-UMR 5175 Centre d'Ecologie Fonctionnelle et Evolutive
1919, route de Mende
34293 Montpellier cedex 5
France
tel: + 33 6 07 32 60 75 (mobile)
+ 33 4 67 61 32 98 (office)
fax: + 33 4 67 41 21 38
pierre-andre.crochet(AT)cefe.cnrs.fr
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passerelle antivirus du campus CNRS de Montpellier
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Subject: Goose ID
From: Bob Moul <AMPipit(AT)COMCAST.NET>
Date: 27 Nov 2006 1:02pm
My sincere thanks to all who have responded thus far,on list
and off, to my request for help in IDing the small goose.
The majority feel that it is a Cackling Goose and most
likely a Richardson's (B.h.hutchinsii)
I appreciate your time, not only for your opinion but for
explaining your reasons for making the ID.
--
Best,
Bob
Bob Moul (AMPipit(AT)comcast.net)
Adams County, PA USA
Canon EOS20D/300mm f/4 IS/1.4IIX
"PROTECTING NATURE THROUGH EDUCATION"
Photo Galleries:
http://www.pbase.com/rcm1840
http://bob.moul.oiseaux.net/index.en.html
Fellow Birders,
On 11/21/2006, I found and photographed this very noticeably
small goose on a creek here in Adams County, South Central
Pennsylvania. An ongoing discussion on the PABirds list
still leaves the ID very much in doubt. I won't post any
details of the opinions offered thus far, hoping a fresh
look by this list's members might shed some new light on a
more positive ID. The photos at the attached link will show
the diminutive size of this goose (very near that of a
Mallard when viewed side by side) also the head shape and
bill length. I am not too sure the coloration of the goose
can be used here for identification due to poor lighting
that morning. However, it can be compared to the normal
Canada's in the photos.
http://www.pbase.com/rcm1840/cacklinggoose
Any input would be gratefully appreciated.
--
Good Birding,
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Subject: More large gulls to ponder
From: Martin Reid <upupa(AT)AIRMAIL.NET>
Date: 28 Nov 2006 8:32am
Dear All,
I've browsed my photos from last season's gulling, and found some new
birds/images that Larophiles might enjoy:
I've expanded the comparison of YLGU-like birds that I added in
August to include a third bird from the intervening year - so there
is now a first-cycle bird from 2004, 2005, and 2006, looking quite
similar:
http://www.martinreid.com/Gull%20website/gullsp112comp.html
- I confess that I feel that this data supports an ID of a pure
taxon, rather than successive, stereotyped hybrids from an unknown
pairing that could consistently produce this suite of characters... -
any feedback on this?
More pics of one of the YLGU-like birds - look at the comparative
mantle shade in the flight shots:
http://www.martinreid.com/Gull%20website/gullsp120b.html
Six adult-like LBBG-types from February 01, 2006 with unfinished
primary molt (five of them have only P8 the longest):
http://www.martinreid.com/Gull%20website/lbbginx.html (bottom of page)
Back in Europe, just one such bird would be considered exceptional
(please correct me if I am wrong on this)...
One of those chunky, hefty-billed first-cycle LBBG-type birds:
http://www.martinreid.com/Gull%20website/gullsp151.html
A tiny (barely bigger than Ring-billed Gull) LBBG-type with a short,
thick bill:
http://www.martinreid.com/Gull%20website/gullsp152.html
As always, I'd appreciate feedback. privately or via ID-F - thanks.
Martin
--
>Martin Reid
>San Antonio, Texas
>mailto:upupa(AT)airmail.net
>http://www.martinreid.com
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Subject: Danish - Black Tern ssp. ??
From: Kenneth Rude Nielsen <kenneth.r.nielsen(AT)netfugl.dk>
Date: 28 Nov 2006 2:10pm
Dear birders
October 9th and 10th. some few Danish birders saw a strange Black Tern resting
and feeding in Ringkøbing Fjord, Hvide Sande Harbor in Western Jutland, Denmark.
It is rare to see Black Terns in October. The tern was different compared to an
ordinary Black Tern ssp. niger. The flanks were grayish and the underpart was
uniform dark.
Please look at the picture:
http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
Is it a niger? or a surinamensis? - what do you think? Comments are very
welcome.
Thanks
BR
Kenneth Rude Nielsen
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Subject: Re: Danish - Black Tern ssp. ??
From: Martin Reid <upupa(AT)AIRMAIL.NET>
Date: 28 Nov 2006 2:49pm
Dear Kenn/All,
Were I to see this Black Tern here in Texas I
would not give it a second look - and I look at
all the thousands of surinamensis that I see
migrating through Texas!
The black of the head/cap is more like niger, but
I see a few such birds every fall. The gray wash
to the flanks and the fairly uniform tone to the
tail/utcs/back looks okay.
Having said all this, I do think that a few niger
can have a faint gray wash on the flanks, so I'm
not sure how much certainty one can have on this
individual. If it had a paler, more White-winged
Tern-like head pattern - uncommon but regular in
surinamensis - I'd feel more comfortable about
calling it surinamensis. see a variety of pics
here:
http://www.martinreid.com/Main%20website/blte.html
Cheers,
Martin
>Dear birders
>
>October 9th and 10th. some few Danish birders
>saw a strange Black Tern resting and feeding in
>Ringk¯bing Fjord, Hvide Sande Harbor in Western
>Jutland, Denmark. It is rare to see Black Terns
>in October. The tern was different compared to
>an ordinary Black Tern ssp. niger. The flanks
>were grayish and the underpart was uniform dark.
>
>Please look at the picture:
>
>http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
>
>Is it a niger? or a surinamensis? - what do you
>think? Comments are very welcome.
>
>Thanks
>
>BR
>
>Kenneth Rude Nielsen
>
>
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>
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--
>Martin Reid
>San Antonio, Texas
>mailto:upupa(AT)airmail.net
>http://www.martinreid.com
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Subject: Re: [cobirds] Interesting pale gull at McIntosh
Res (Longmont, CO)
From: Martin Reid <upupa(AT)AIRMAIL.NET>
Date: 28 Nov 2006 3:25pm
Dear Tony, Al, et al,
While I agree with much of what Alvaro wrote, I
found his point 2) a bit confusing - is it saying
that SBGU must have blackish or black primaries
and tail? - I don't think so, as any look at pics
from Japan - e.g. these recent ones:
http://www23.tok2.com/home/jgull/061101/slaty.htm
- will show that most have brownish flight
feathers rather than blackish (or are most of the
birds at this site hybrids?) I assume that Al
was saying that because of all the possible West
Coast hybrid combos that would result in brown
wings/tail, only the minority of SBGUs that HAVE
blackish wings/tail can be seriously assessed for
being an actual SBGU... ?
Also, point 3) is perhaps over-emphasised, as a
look at the web page mentioned above shows more
birds with rather uniform, AMHE-like
tail/rump/UTC than those where the tail/rump/UTC
are contrastingly paler. I know this is a small
sample, but I think it's enough to demonstrate
that the degree of contrast in this area is very
variable.
Now then, I have no definite personal experience
with first-cycle SBGU - I'm only going from the
pics I see from Japan and Korea. And I'm serious
about asking if a significant number of birds
called first-cycle SBGU on such sites are
possibly hybrids - ? Either they aren't, and
thus SBGUs are not quite the beasts much of the
literature says they are (e.g. "solid tail" is
clearly misleading, based on the pics at such
sites), or there is enough of a hybrid content in
this population to render it a flawed source for
absorbing the range of features shown by SBGU...
any thoughts?
Cheers,
Martin
>Hey Tony et al.
>
> I am just back from three weeks out of the
>country, so a bit out of it in more ways than
>one. In any case, I think the key is that you
>need to get this bird closer in and photograph
>the heck out of it. There are several features
>to try and determine: 1) structure - classic
>structure appears to be long-necked, large
>rotund body but this impression offset by long
>wings. Often pot-bellied and has may show a deep
>"keel" just behind the legs. Short-legged,
>waddles when it walks, along with long necked,
>rotund body imparts an impression similar to
>that of a small goose (I realize that the image
>seems odd, but it seems a good way to describe
>this subtle look of the classic member of this
>species). 2) Make sure that the primaries and
>tail are really blackish, or nearly black. This
>would eliminate many individuals of the hybrid
>combinations that could end up looking like a
>Slaty-backed. 3) Rump and lower back should be
>whitish, contrasting clearly with the tail and
>upperback. Many hybrids are pretty uniform here,
>not showing the white. 4) Streaked look to the
>head, and some impression of solid dark around
>the eyes. 5) Greater coverts with low contrast,
>not heavily marked.
>
>I am attaching a photo of a juvenile gulls
>photographed here in Half Moon Bay on Oct. 22
>which at first I contemplated as a juvenile
>Slaty-backed but backed off upon further
>consideration. The bird was big, the size of a
>Western Gull, so while similar in plumage to a
>Thayer's Gull, this was no Thayer's Gull. The
>features that made me decide against
>Slaty-backed were the Herring Gull like
>structure, no pot-bellied look or short legs (I
>realize these features are not visible in the
>photos I sent). The tail looks too pale, not
>blackish enough to me, suggesting this is a
>hybrid bird. As well the open wing shots show a
>poorly defined pattern of blackish on the
>primaries, looking grayish except for the very
>tip and outer vane of the primaries, again I
>think this points to a hybrid. Finally, the
>rump/tail/back contrast appears too low to me. I
>decided that this was a Herring x
>Glaucous-winged hybrid, this is the first
>juvenile I have ever seen of this rather common
>combination (at least on the West Coast).
>
>I hope this helps in your thinking.
>
>Cheers
>
>Alvaro
>
>Alvaro Jaramillo
><mailto:chucao(AT)coastside.net>chucao(AT)coastside.net
>Half Moon Bay, California
>
>Field Guides - Birding Tours Worldwide
><http://www.fieldguides.com>www.fieldguides.com
>
>From: GreatGrayOwl(AT)aol.com [mailto:GreatGrayOwl(AT)aol.com]
>Sent: Sunday, November 26, 2006 6:13 PM
>To: SGMlod(AT)aol.com; georgearmistead(AT)hotmail.com;
>jbouton2(AT)EARTHLINK.NET; Ensifera(AT)aol.com;
>cameron_cox(AT)hotmail.com; clw37(AT)cornell.edu;
>thebrit1(AT)verizon.net; Dma3(AT)aol.com;
>rwfrenchjr(AT)comcast.net; Miliff(AT)aol.com;
>chucao(AT)coastside.net; cerwa(AT)earthlink.net;
>ken.behrens(AT)gmail.com; lehman.paul(AT)verizon.net;
>tsweet(AT)comcast.net; upupa(AT)airmail.net;
>david_sibley(AT)comcast.net; bls42(AT)cornell.edu;
>jvanderpoel(AT)peregrinevideo.com
>Subject: Fwd: [cobirds] Interesting pale gull at McIntosh Res (Longmont, CO)
>
>Hi all:
>
>Most of you on the distribution of this missive
>have some experience with Slaty-backed Gull and
>I was hoping that you could look at the pictures
>and brief description of a bird that I found
>today in CO (website link below). I am not at
>all wed to the my tentative ID of the bird,
>having never seen a SBGU this young before.
>However, it does seem to, at least
>superficially, bear a strong resemblance to some
>illustrations and photos of first-cycle SBGUs.
>I realize that the pictures are, at best, only
>potentially suggestive, but I would greatly
>appreciate any comments you might have about the
>ID of the bird.
>
>Thanks,
>
>Tony
>
>Attachment converted: Macintosh HD:GWGUxHEGU3.jpg (JPEG/«IC») (0070DFC3)
>Attachment converted: Macintosh HD:GWGUxHEGU1.jpg (JPEG/«IC») (0070DFC6)
>Attachment converted: Macintosh HD:GWGUxHEGU2.jpg (JPEG/«IC») (0070DFCB)
--
>Martin Reid
>San Antonio, Texas
>mailto:upupa(AT)airmail.net
>http://www.martinreid.com
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Subject: Sexing Short-eared Owls in the field
From: "Wayne C. Weber" <contopus(AT)TELUS.NET>
Date: 28 Nov 2006 3:45pm
Bird ID People,
The Sibley Guide to Birds indicates that, in Short-eared Owls,
adult males average considerably paler on the underparts and
under the wings than females. Does anyone know whether these
differences are sufficient to reliably sex individuals in the field, or
is this just an "on average" difference with considerable overlap?
David, I know that you monitor this group, so if you have time to
respond, your comments would be particularly welcome.
Sincerely,
Wayne C. Weber
Delta, BC
contopus(AT)telus.net
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Subject: Fw: Danish - Black Tern ssp. ??
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 28 Nov 2006 4:03pm
If your bird is a 1st winter than the answer is yes. Do you have a
description of the bird's crown and upperparts?
Norman
Kenneth Rude Nielsen wrote: > October 9th and 10th. some few Danish birders
saw a strange Black Tern resting and feeding in Ringkøbing Fjord, Hvide
Sande Harbor in Western Jutland, Denmark. It is rare to see Black Terns in
October. The tern was different compared to an ordinary Black Tern ssp.
niger. The flanks were grayish and the underpart was uniform dark.
Please look at the picture:
http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
Is it a niger? or a surinamensis? - what do you think? Comments are very
welcome.
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Subject: accentor identification
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 28 Nov 2006 4:15pm
Radioactive Robins has been updated with an accentor section in an attempt
to bring clarity in the identification of an Alpine Accentor of sorts seen
in the Port of Rotterdam some years ago. Have a look at:
http://members.lycos.nl/radioactiverobins/
Please feel free to respond.
All the best,
Norman Deans van Swelm
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Subject: Re: Danish - Black Tern ssp. ??
From: "James P. Smith" <keenbirder(AT)YAHOO.COM>
Date: 29 Nov 2006 7:47am
----INCLUDING text/plain MIME SECTION----
Hello Kenneth,
Here's a selection of images of juvenile surinamensis taken on Cape Cod in
mid-August 2005, admittedly taken quite a bit earlier in the autumn than your
observation. The images show a range of flight and perched shots, including the
flank pattern, and the White-winged Tern like head pattern described by Martin.
Hope this helps out.
http://keenbirding.com/Fall05/BlkTernjvflight130805.html
http://keenbirding.com/Fall05/BlkTernjv130805.html
Best Wishes,
James P. Smith
Amherst, MA.
Kenneth Rude Nielsen <kenneth.r.nielsen(AT)NETFUGL.DK> wrote: Dear birders
October 9th and 10th. some few Danish birders saw a strange Black Tern resting
and feeding in Ringkøbing Fjord, Hvide Sande Harbor in Western Jutland, Denmark.
It is rare to see Black Terns in October. The tern was different compared to an
ordinary Black Tern ssp. niger. The flanks were grayish and the underpart was
uniform dark.
Please look at the picture:
http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
Is it a niger? or a surinamensis? - what do you think? Comments are very
welcome.
Thanks
BR
Kenneth Rude Nielsen
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Everyone is raving about the all-new Yahoo! Mail beta.
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Subject: Re: accentor identification
From: Lee Evans <LGREUK400(AT)AOL.COM>
Date: 29 Nov 2006 9:08am
----INCLUDING text/plain MIME SECTION----
Norman
I really do not wish to be rude or condescending but, in my opinion, the bird
in your two images taken in Rotterdam is clearly a Dunnock (or Hedge
Accentor). There is no way that this bird is an Alpine Accentor of any form. I
am not
familiar with some of the far eastern accentor species, but from your images,
I see no reason to doubt its identity as Dunnock.
Sorry to be so negative
Lee G R Evans
British Birding Association
UK400 Club, Rare Birds Magazine & Ornithological Consultant
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Subject: Fw: [EBN] Fw: BIRDWG01 greek listserv
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 30 Nov 2006 5:08am
>> hello
>> watch at
>>
>> http://www.ornithologiki.gr/en/enmain.htm
>>
>> Georges Olioso
>>
>> des photos d'oiseaux d'ici et d'ailleurs sur
>> http://georges.olioso.oiseaux.net/
>> ----- Original Message -----
>> From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
>> To: "Eurobirdnet" <EBN(AT)physis.pnw.fi>
>> Sent: Wednesday, November 29, 2006 10:16 PM
>> Subject: [EBN] Fw: BIRDWG01 greek listserv
>>
>>> Can anyone help Elias,please?
>>>
>>> ----- Original Message -----
>>> From: "Elias Elias" <eliaselias(AT)humboldt1.com>
>>> Sent: Wednesday, November 29, 2006 8:07 PM
>>> Subject: BIRDWG01 greek listserv
>>>
>>>> I am looking for an english language listserv for Greece. On the off
>>>> chance do you know of any? Being from Europe, I figured that you might
>>>> know.
>>>> Elias Elias
>>>> Arcata, California
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Subject: Re: accentor identification
From: "Norman D.van Swelm" <Norman.vanswelm(AT)wxs.nl>
Date: 30 Nov 2006 8:10am
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Rude? Condescending or negative? By no means Lee, I highly appreciate your
opinion and as you may have read on
http://members.lycos.nl/radioactiverobins/
you are not alone in identifying this accentor as Prunella modularis. So Lee
are Dunnocks in Buckinghamshire similar in size to Alpine Accentors and do they
have an (under) tail and under-tail coverts similar to Prunella collaris, a
white belly, their mantle admixed with grey, a straight and sharply pointed
culmen as well as a black mask? If so send me some pictures please for display
on:
http://members.lycos.nl/radioactiverobins/
All the best, Norman
Lee G R Evans wrote: >I really do not wish to be rude or condescending but, in
my opinion, the bird in your two images taken in Rotterdam is clearly a Dunnock
(or Hedge Accentor). There is no way that this bird is an Alpine Accentor of
any form. I am not familiar with some of the far eastern accentor species, but
from your images, I see no reason to doubt its identity as Dunnock.
Sorry to be so negative
8 Sandycroft Road
Little Chalfont
Amersham
Buckinghamshire
England
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Subject: Re: Danish - Black Tern ssp. ??
From: Kenneth Rude Nielsen <kenneth.r.nielsen(AT)netfugl.dk>
Date: 30 Nov 2006 10:35am
Dear birders
Thank you for all the replies. The birders who saw the tern have send me some
field notes.
Please read below.
BR
Kenneth
Description of a Black Tern (Chlidonias niger) with characters close to American
Black Tern (Chlidonias niger surinamensis) observed at the West Coast of
Jutland, Denmark, on 9-10th October 2006.
Except for the head pattern which seems to look like the nominate race ssp.
niger, the other
characters seems to fit the American race ssp. surinamensis. If this Black Tern
safely can be
identified as surinamensis it will be a first for Denmark. All comments are very
welcome.
Jizz – general impression A classic small Chlidonias Tern much smaller and
darker than Sandwich Tern and Common Tern, which were also seen at the site.
Differences compared to Black Tern ssp. niger was not found although without
direct comparison.
Head & Bill The bill was black and the head pattern, especially the crown,
seemed to be like a classic nominate Black Tern ssp. niger, with brown/black
“ear-phones”, crown, nape and white forehead. The brown/black crown started
above the eye and was in contrast to the white forehead and a thin narrow white
line extending to behind the eye, creating an eyebrow effect. The head pattern
was in contrast to a huge white “necklace” though with a dark nape. The colour
of the head pattern was uniform and no contrast between the crown and
“ear-phones” was seen.
Upperparts The upperparts seemed to be rather dark and uniform at medium to long
range – without any obvious “saddle effect”. There was only a very slight
contrast between the upper-tail coverts and the mantle as well as between the
tail and upper-tail coverts. The slight contrast to the upper-tail coverts could
only be detected at close range in the field, but is also obvious in some of
the photos.
Mantle & Tail The mantle and scapulars were grey-brown with neat pale fringes
only observed at close range, and the bird was therefore aged as a 1 cy.
Furthermore, Klaus Malling Olsen has commented, that the lack of moulting
contrast in the primaries (which was not noticed in the field, but can be seen
in one of the photos) supports that the bird is in fact a 1 cy. At close to
medium range there was a very modest “saddle effect”. The tail was slightly
darker than the upper-tail coverts which were grey and uniform.
Breast & under-tail coverts The tern was white on throat, breast and under-tail
coverts, with a huge brown/black “peg” right in front of the wing. On the
flanks, the tern had very obvious grey markings extending from the “peg” to the
rear end of the wing, but with a clearly whiter part in the middle. The grey
flank markings were always very obvious at close and medium range.
Wings The front edge of the wing was dark due to a black carpal bar that
together with the darker mantle and scapulars created a T-like appearance. The
general impression at medium range was uniform dark grey upperparts. The
under-wing seemed white in the field. However in some photos the under-wing seem
greyish rather than white and there is no clear contrast between the grey flank
markings and the under-wing.
Comments The author of “Terns in Europe and North America (1995)” Klaus Malling
Olsen has, based on photos taken by him in Massachusetts in September 1997
commented on www.netfugl.dk, that surinamensis in fact can show a head pattern
resembling ssp. niger.
Yours Sincerely
Ulf Møller and Alex Sand Frich
Pictures of the tern:
http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
-----Oprindelig meddelelse-----
From: "James P. Smith" keenbirder(AT)YAHOO.COM
Date: Wed, 29 Nov 2006 15:47:07 +0100
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Subject: Re: [BIRDWG01] Danish - Black Tern ssp. ??
> Hello Kenneth,
>
> Here's a selection of images of juvenile surinamensis taken on Cape Cod in
mid-August 2005, admittedly taken quite a bit earlier in the autumn than your
observation. The images show a range of flight and perched shots, including the
flank pattern, and the White-winged Tern like head pattern described by Martin.
Hope this helps out.
>
> http://keenbirding.com/Fall05/BlkTernjvflight130805.html
>
> http://keenbirding.com/Fall05/BlkTernjv130805.html
>
>
> Best Wishes,
>
> James P. Smith
> Amherst, MA.
>
>
> Kenneth Rude Nielsen <kenneth.r.nielsen(AT)NETFUGL.DK> wrote: Dear birders
>
> October 9th and 10th. some few Danish birders saw a strange Black Tern resting
and feeding in Ringkøbing Fjord, Hvide Sande Harbor in Western Jutland,
Denmark. It is rare to see Black Terns in October. The tern was different
compared to an ordinary Black Tern ssp. niger. The flanks were grayish and the
underpart was uniform dark.
>
> Please look at the picture:
>
> http://netfugl.dk/pictures.php?id=showpicture&picture_id=14125&language=uk
>
> Is it a niger? or a surinamensis? - what do you think? Comments are very
welcome.
>
> Thanks
>
> BR
>
> Kenneth Rude Nielsen
>
>
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>
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>
>
>
> ---------------------------------
> Everyone is raving about the all-new Yahoo! Mail beta.
>
>
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>
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Subject: Re: Danish - Black Tern ssp. ??
From: Lee Evans <LGREUK400(AT)AOL.COM>
Date: 30 Nov 2006 11:33am
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Hi Kenneth
I personally find the identification of putative North American Black Terns
in NW Europe rather difficult, especially if they involve non-classic
individuals. The Danish individual of 9th October 2006 is a very interesting
individual
indeed and although it shows the dark grey wash down the side of the flanks
and an obvious dark breast 'spur', it does appear in some images to have
whitish underwing-coverts and quite an extensive dark line extending from the
crown
down the nape. Nevertheless, the similarities between this bird and juveniles
observed in Ireland (Sandymount Strand, Dublin, from 3rd-7th September 1999)
and in Britain (Weston-super-Mare, Avon, from 3rd-11th October 1999) is
uncanny. Studying the 9 images presented on the Netfugl website, my own personal
view
would be that the bird IS a juvenile North American Black Tern. It fulfils
the following important criteria -:
1) It has extensive very dark breast-side patches merging with sullied grey
foreflanks. The flanks are not solidly dark grey like typical surinamensis but
are densely marked st the fore area.
2) Images 1 and 2 appear to show concolorous upperparts, with little contrast
between the rump and upper tail. They appear to be uniformly dark.
3) Juvenile Surinamensis has a head pattern akin to White-winged Black Tern,
with a paler crown, nape and forehead than Eurasian Black Tern. The head
pattern of the Danish bird appears to be within the variation of NABT, although
I
accept that the dark extension down the nape is quite extensive..
4) The upperwing coverts appear very dark and are again concolorous with the
mantle.
5) The underwing-coverts appear off-white rather than gleaming white.
As I said earlier, the separation of these two species may not be as easy as
first understood. Last autumn, Keith Vinicombe and I recorded an extremely
late adult Black Tern in Britain (in Somerset in late November) which was still
largely in summer plumage - an apparent feature of surinamensis. It also had
rather grey underwing-coverts, another NABT feature. However, the crown lacked
the pale grey peppering diagnostic of NABT and was considered a niger after
several days of detailed study.
Very best wishes
Lee G R Evans
British Birding Association
UK400 Club, Rare Birds Magazine & Ornithological Consultant
Discussion Forum/Email Group: _http://groups.yahoo.com/group/UK400Club/_
(http://groups.yahoo.com/group/UK400Club/)
Email Address: LGREUK400(AT)aol.com
Website Address: _www.uk400clubonline.co.uk_
(http://www.uk400clubonline.co.uk/)
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; also Mobile Discos (Nighthawk
Roadshow); CD Vinyl & DVD Sales; Haynes Car Manuals For Sale; Prestige Car
Delivery; UK Courier and Road Traffic Officing)
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Subject: Re: Danish - Black Tern ssp. ??
From: "Lethaby, Nick" <nlethaby(AT)TI.COM>
Date: 30 Nov 2006 12:11pm
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Being on the extreme W. coast I only see American Black Terns
occasionally, but I distinctly recall seeing one that had a dark line
going from the crown almost to the nape. I remember thinking that the
head pattern might not be so useful, but of course this may have been an
atypical individual.
=20
Nick Lethaby
DSP/BIOS Product Manager
Software Development Systems
Texas Instruments
805 562 5106
nlethaby(AT)ti.com
=20
________________________________
From: NBHC ID-FRONTIERS Frontiers of Field Identification
[mailto:BIRDWG01(AT)LISTSERV.ARIZONA.EDU] On Behalf Of Lee Evans
Sent: Thursday, November 30, 2006 10:34 AM
To: BIRDWG01(AT)LISTSERV.ARIZONA.EDU
Subject: Re: [BIRDWG01] Danish - Black Tern ssp. ??
=20
Hi Kenneth
=20
I personally find the identification of putative North American Black
Terns in NW Europe rather difficult, especially if they involve
non-classic individuals. The Danish individual of 9th October 2006 is a
very interesting individual indeed and although it shows the dark grey
wash down the side of the flanks and an obvious dark breast 'spur', it
does appear in some images to have whitish underwing-coverts and quite
an extensive dark line extending from the crown down the nape.
Nevertheless, the similarities between this bird and juveniles observed
in Ireland (Sandymount Strand, Dublin, from 3rd-7th September 1999) and
in Britain (Weston-super-Mare, Avon, from 3rd-11th October 1999) is
uncanny. Studying the 9 images presented on the Netfugl website, my own
personal view would be that the bird IS a juvenile North American Black
Tern. It fulfils the following important criteria -:
=20
1) It has extensive very dark breast-side patches merging with sullied
grey foreflanks. The flanks are not solidly dark grey like typical
surinamensis but are densely marked st the fore area.
=20
2) Images 1 and 2 appear to show concolorous upperparts, with little
contrast between the rump and upper tail. They appear to be uniformly
dark.
=20
3) Juvenile Surinamensis has a head pattern akin to White-winged Black
Tern, with a paler crown, nape and forehead than Eurasian Black Tern.
The head pattern of the Danish bird appears to be within the variation
of NABT, although I accept that the dark extension down the nape is
quite extensive..
=20
4) The upperwing coverts appear very dark and are again concolorous with
the mantle.
=20
5) The underwing-coverts appear off-white rather than gleaming white.
=20
As I said earlier, the separation of these two species may not be as
easy as first understood. Last autumn, Keith Vinicombe and I recorded an
extremely late adult Black Tern in Britain (in Somerset in late
November) which was still largely in summer plumage - an apparent
feature of surinamensis. It also had rather grey underwing-coverts,
another NABT feature. However, the crown lacked the pale grey peppering
diagnostic of NABT and was considered a niger after several days of
detailed study.
=20
Very best wishes=20
=20
Lee G R Evans
British Birding Association
UK400 Club, Rare Birds Magazine & Ornithological Consultant
Discussion Forum/Email Group: http://groups.yahoo.com/group/UK400Club/
Email Address: LGREUK400(AT)aol.com
Website Address: www.uk400clubonline.co.uk
<http://www.uk400clubonline.co.uk/>=20
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;
also Mobile Discos (Nighthawk Roadshow); CD Vinyl & DVD Sales; Haynes
Car Manuals For Sale; Prestige Car Delivery; UK Courier and Road Traffic
Officing)
Join or Leave BIRDWG01:
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