jsk_ppp 5/09/2016 22:40
Gull ID please
Is it a first winter Slaty-backed Gull? Thank you.
Mai Po - 4 September 2016
cgeoff 6/09/2016 14:18
It's not Slaty-backed, no. However, do you have more photos? Images showing the bird side-on and in flight would be interesting.
GeoffC
jsk_ppp 6/09/2016 22:47
Thank you for your advice. I have two more photos, but no side-on nor in-flight showing the back and tail.
ajohn 7/09/2016 21:11
This gull has been around for a few weeks, joining the two that have oversummered in Deep Bay. It has very pale plumage (whitish) with darker subterminal marks on the upperparts, and on this basis I had thought it was a Mongolian Gull.
I'm slightly confused by age though, because I thought the body looks like a first winter, but the stage of moult does not seem to be correct for that age.
jsk_ppp 7/09/2016 23:57
Thank John for the reply. I have two more photos, but I guess they won't be of any help.