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        Discussion Area 討論區 >> Photo Gallery 相片分享 I >>  Black-Headed Gull 紅咀鷗
        
(Message started by: Thomas_Chan on May 4th, 2006, 4:47pm)
Title: Black-Headed Gull 紅咀鷗
Post by Thomas_Chan on May 4th, 2006, 4:47pm
http://images4.fotop.net/albums3/ThomasChan/Saunder_Gull/apr_30_06_6.jpg

30/4/2006
Mai Po 米埔浮橋
Leica 800mm + 20D
ISO200 f5.6 1/2500s
Title: Re: Saunder's Gull 黑咀鷗
Post by David_Diskin on May 4th, 2006, 10:20pm
Anton -

Nice photo, but I think this is a 1st-summer Black-headed Gull, not a Saunders' Gull.

Firstly, no Saunders' Gulls have been reported off the boardwalk since Mai Po re-opened, as far as I'm aware. The only gulls I've seen off there recently are Black-headed Gulls. (Although, interestingly, with regard to Saunders' Gull, the Avifauna states that an "occasional bird may linger into late April or early May, and the latest spring record for HK concerns a first-summer that remained until 30 May 1993".) However, this is exceptional and any gull you see in HK at this time of year (late April/May) is likely to be Black-headed Gull.

Amongst other differences, the bill of Saunders' Gull is short, stubby & black. The bill on the bird in the photograph is longer, thinner and (less obviously) bi-coloured. The wing-pattern also indicates B-h Gull (although the angle of the photo makes this less easy to discern).

The photographs in "A Photographic Guide to the Birds of Hong Kong" are useful here, although unfortunately there are no pictures of Saunders' Gull in flight in the book.

dave diskin
Title: Re: Saunder's Gull 黑咀鷗
Post by Anton on May 4th, 2006, 11:58pm

on 05/04/06 at 22:20:13, David_Diskin wrote:
Anton -

Nice photo, but I think this is a 1st-summer Black-headed Gull, not a Saunders' Gull.

Firstly, no Saunders' Gulls have been reported off the boardwalk since Mai Po re-opened, as far as I'm aware. The only gulls I've seen off there recently are Black-headed Gulls. (Although, interestingly, with regard to Saunders' Gull, the Avifauna states that an "occasional bird may linger into late April or early May, and the latest spring record for HK concerns a first-summer that remained until 30 May 1993".) However, this is exceptional and any gull you see in HK at this time of year (late April/May) is likely to be Black-headed Gull.

Amongst other differences, the bill of Saunders' Gull is short, stubby & black. The bill on the bird in the photograph is longer, thinner and (less obviously) bi-coloured. The wing-pattern also indicates B-h Gull (although the angle of the photo makes this less easy to discern).

The photographs in "A Photographic Guide to the Birds of Hong Kong" are useful here, although unfortunately there are no pictures of Saunders' Gull in flight in the book.

dave diskin


Hi~ Dave~
Thanks for your information~  :)
(But are you referring to Thomas' photo instead?)

Anton
Title: Re: Saunder's Gull 黑咀鷗
Post by KK Hui on May 5th, 2006, 10:41am
See this shot of a Saunder's Gull taken in late March this year ...
http://www.hkbws.org.hk/cgi-bin/yabb/YaBB.pl?board=PhotoGallery;action=display;num=1144320835

KK Hui FRPS
www.geocities.com/kkhui_001
Title: Re: Black-Headed Gull 紅咀鷗
Post by Thomas_Chan on May 5th, 2006, 2:06pm
Thanks for Dave and KK identification!
Title: Re: Black-Headed Gull 紅咀鷗
Post by David_Diskin on May 5th, 2006, 9:15pm
Anton -

Ooops. Not sure why I addressed my comments to you!!
Apologies.

dave diskin
Title: Re: Black-Headed Gull 紅咀鷗
Post by Anton on May 6th, 2006, 12:33pm

on 05/05/06 at 21:15:48, David_Diskin wrote:
Anton -

Ooops. Not sure why I addressed my comments to you!!
Apologies.

dave diskin


HAHA~ That's OK~  ;D
Learnt something from your comments anyway~


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