ID-FRONTIERS for March 9-15, 2008

Messages are displayed in the order they were received.  Subject  From  Date   Time   Black-crowned Night Heron racial identification   Lee Evans    Mon, 10 Mar 2008   2:03pm   Greater Redpolls   David Sibley    Tue, 11 Mar 2008   7:15am   Re: Greater Redpolls   Graham Etherington    Tue, 11 Mar 2008   7:47am   Gull, Scotland.   phil barnett    Fri, 14 Mar 2008   4:23am

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Subject: Black-crowned Night Heron racial identification
From: Lee Evans <LGREUK400(AT)AOL.COM>
Date: 10 Mar 2008 2:03pm

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Here in the UK, we currently have a wintering BLACK-CROWNED NIGHT HERON in 
Lancashire (see images on _www.Surfbirds.com_ (http://www.Surfbirds.com) ) (Rare
Bird Gallery) being touted in some circles as belonging to the North American 
form hoactli. I have always struggled in trying to separate the European 
(nominate) form from hoactli, especially in winter, and was wondering if anyone
on
this forum could kindly supply me with hard evidence for separating them. 
Previous writers have obviously concentrated on size and the width of the white
'eye-brow', and in breeding plumage, hoactli has much duller (salmon-pink) bare
part colouration, but these features can be subjective and the eye-brow 
feature is variable between individuals.
 
In fact, I parallel Night Heron racial separation with that of the respective 
forms of Great White (Egret) Heron, and cannot find any tangible evidence 
that allows a definite prognosis either way.  

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/RareBirdAlertforBritainandIreland_UK400ClubBBA/)
Email Address: LGREUK400(AT)aol.com
Website Address: _www.uk400clubonline.co.uk_ 
(http://www.uk400clubonline.co.uk/) 

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: Greater Redpolls
From: David Sibley <david_sibley(AT)COMCAST.NET>
Date: 11 Mar 2008 7:15am

Hi all,

On my blog recently I've posted several notes about identification of 
"Greater" Common Redpoll, which may be of interest to a lot of 
ID-Frontiers readers. In today's post I put up photos of apparent 
"Greater" redpolls from Wisconsin and Alberta, which suggests that 
everyone who sees redpolls should keep an eye out for this subspecies. 
I'd be interested in any comments and discussion.

Good Birding,
David Sibley

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Subject: Re: Greater Redpolls
From: Graham Etherington <britishbirder(AT)GMAIL.COM>
Date: 11 Mar 2008 7:47am

For those that don't already have it bookmarked, David's excellent
blog can be found at:
http://sibleyguides.blogspot.com/

Cheers,
Graham Etherington

On Tue, Mar 11, 2008 at 2:14 PM, David Sibley <david_sibley(AT)comcast.net> wrote:
> Hi all,
>
>  On my blog recently I've posted several notes about identification of
>  "Greater" Common Redpoll, which may be of interest to a lot of
>  ID-Frontiers readers. In today's post I put up photos of apparent
>  "Greater" redpolls from Wisconsin and Alberta, which suggests that
>  everyone who sees redpolls should keep an eye out for this subspecies.
>  I'd be interested in any comments and discussion.
>
>  Good Birding,
>  David Sibley
>
>
>  Join or Leave BIRDWG01:
http://listserv.arizona.edu/cgi-bin/wa?SUBED1=birdwg01
>
>  Archives: http://listserv.arizona.edu/archives/birdwg01.html
>

-- 
Dr. Graham Etherington
Norwich, UK

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Subject: Gull, Scotland.
From: phil barnett <philbarnettox(AT)YAHOO.COM>
Date: 14 Mar 2008 4:23am

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Following on from the Oxfordshire (and Derbyshire) gull, there's another
interesting Kumlien's /Thayer's type gull (!) recently in Scotland, in Dumfries
and Galloway. Any opinion on this one (Martin?)?
   
  http://www.surfbirds.com/cgi-bin/gallery/display.cgi?gallery=gallery9

http://www.surfbirds.com/cgi-bin/gallery/display.cgi?gallery=gallery9&start=13
  Photos also on here.
  http://www.atricillaimages.co.uk/index.php?q=node/2857
   
  Cheers,
   
  Phil

       
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