HKBWS Forum 香港觀鳥會討論區 - Powered by Discuz! Board

Subject: Glaucous-Winged Gull? 灰翅鷗? [Print This Page]

Author: cthomas Time: 23/03/2009 22:17 Subject: Glaucous-Winged Gull? 灰翅鷗?

22/3/2009
Mai Po 米埔

Image Attachment: mar_22_09_1.jpg (23/03/2009 22:17, 50.42 KB) / Download count 424
http://hkbws.org.hk/BBS/attachment.php?aid=3326

Image Attachment: mar_22_09_2.jpg (23/03/2009 22:17, 47.84 KB) / Download count 416
http://hkbws.org.hk/BBS/attachment.php?aid=3327

Author: cgeoff Time: 24/03/2009 12:19

Quite tricky with such distant shots as this. However, I think this is probably Slaty-backed Gull. The tertials and primaries in the closed wing appear rather dark, and overall the bird is a little darker than I would expect 1y Glaucous-winged to be, esp the tail.

Geoff

Author: lpaul Time: 24/03/2009 13:25

Do you have any pictures which show the under wing, especially the underside of the primaries. These are strikingly pale on 1st winter G-w Gull. I would favour G-w Gull, but without better photos it is difficult to be sure. I think the overall uniformity of the bird (especially the lack of a pale rump/uppertail coverts) fits G-w Gull better than Slaty-backed.

[ Last edited by lpaul at 25/03/2009 11:38 ]

Author: cthomas Time: 11/04/2009 22:57

Thanks for all reply!
I have took another picture today. May this one be a GW Gull?
11/4/2009
Mai Po

[ Last edited by cthomas at 11/04/2009 23:20 ]

Image Attachment: apr_11_09_1.jpg (11/04/2009 22:57, 50.63 KB) / Download count 427
http://hkbws.org.hk/BBS/attachment.php?aid=3457

Welcome to HKBWS Forum 香港觀鳥會討論區 (http://hkbws.org.hk/BBS/)