8/2/2008
Nam Sang Wai 南生圍
Leica 800mm + 20D
ISO200 f5.6 1/640s, 1/800s Author: cgeoff Time: 14/02/2008 12:10
I suspect both these are Heuglin's Gulls. The first a near-adult, the second and 2nd or 3rd winter, though difficult to say for the latter.
Adult Yellow-legged Gulls have pale grey upperparts, very little streaking at this time of year and a large white mirror in the outer primaries.
An immature would, in comparison with the bird photographed here, be largely white on the underparts with a brighter yellow bill base.
Geoff Author: cthomas Time: 15/02/2008 21:41
[quote:c8f3a8d336="cgeoff"]I suspect both these are Heuglin's Gulls. The first a near-adult, the second and 2nd or 3rd winter, though difficult to say for the latter.
Adult Yellow-legged Gulls have pale grey upperparts, very little streaking at this time of year and a large white mirror in the outer primaries.
An immature would, in comparison with the bird photographed here, be largely white on the underparts with a brighter yellow bill base.
Geoff[/quote]
Geoff,
Thanks for your ID!
Here are another two photos:
9/2/2008
Nam Sang Wai 南生圍
Leica 800mm + 20D
ISO200 f5.6 1/500s, 1/1250s Author: cthomas Time: 14/03/2008 22:25
9/3/2008
Mai Po 米埔
Leica 800mm + 20D
ISO200 f7.1 1/2000s Author: cgeoff Time: 15/03/2008 09:44
Again, all these appear to be Heuglin's. The adult featured in the final three is a classic bird for this time of year. P10 is not quite completely grown, which is characteristic of a number of heuglini at this time of year. Yellow-legged Gull completes before the turn of the year, and vegae completes about the turn of the year or soon after.
Geoff
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