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        Discussion Area 討論區 >> Photo Gallery 相片分享 I >>  Heuglin's Gull 烏灰銀鷗 title was amended
        
(Message started by: KK Hui on Mar 19^th, 2004, 10:20pm)

Title: Heuglin's Gull 烏灰銀鷗 title was amended
Post by KK Hui on Mar 19^th, 2004, 10:20pm

165 Heuglin's Gull 烏灰銀鷗
Mai Po Nature Reserve 米埔自然保護區
19/3/2004
EOS-10D, EF600/4L + EF1.4x
Evaluative @ -2/3, ISO 400
http://www.hkbws.org.hk/fileServer/PhotoG/kkhui/kkhuiheuglingull01.jpg

A shot of this Yellow-legged Gull marks my return to Mai Po NR ...

KK Hui ARPS
www.geocities.com/kkhui_001

Title: Re: Yellow-legged Gull
Post by Griffin on Mar 19^th, 2004, 10:35pm

Yeah! ;D ;D ;D

Title: Re: Yellow-legged Gull
Post by Daniel CK Chan on Mar 20^th, 2004, 1:21pm

KK, wait to see more.............Daniel

Title: Re: Yellow-legged Gull
Post by gjcarey on Mar 21^st, 2004, 9:40am

Excellent shot KK. However, it's not Yellow-legged Gull. Confusingly, Yellow-legged Gulls in HK, which are of the taxon Larus cachinnans mongolicus have pinkish legs!

The deep yellow legs of this bird indicate this is a Heuglin's Gull, as do the following:

a) the streaks on the nape and head (on mongolicus these are absent at this time)

b) fairly dark grey upperparts (on mongolicus these are significantly paler)

c) incomplete primary moult. You can see on this photo that the outermost primary, which is the longest on gulls, is not yet full-grown.

d) there is only one relatively small white 'mirror' in the outer primaries; on mongolicus this is usually larger and there is often two.

Regards,

Geoff

Title: Re: Yellow-legged Gull
Post by KK Hui on Mar 21^st, 2004, 10:25am

Thanks for your interesting input, Geoff! ;D

Identifying gull species has never been easy, I know. I'm now totally confused to say the least ... What exactly is a Heuglin's Gull? ??? and it's scientific name again please? It's not in my reference books. What about Vega Gull?

Anyway I thought I post here another shot taken on the same day/time and probably of the same species too ...

http://img5.photobucket.com/albums/v22/kkhui/Avian/190304_40x.jpg

Best
KK Hui ARPS
www.geocities.com/kkhui_001