|1st-winter Caspian Gull Lyle Park, London 17th December 2016|
First off was Lyle Park, where the regular 1st-winter Caspian Gull 'Lyle' was hanging out early on; there was also an adult Yellow-legged Gull while a re-visit later on produced another first-winter Caspian Gull, this time a more marginal bird with a relatively stubby bill and in flight a fairly decent sized tail band (not inconceivable that there is some Herring genes in its lineage).
Thames Barrier Park didn't really have many large gulls today, but there was an adult Mediterranean Gull (metal ringed) and an oddball, aberrant Black-headed Gull with largely white primaries - saw this bird at the O2 today too, which shows the way birds commute between the sites.
|aberrant Black-headed Gull Thames Barrier Park, London 17th December 2016|
We visited the mud at the end of the O2 in North Greenwich too - typically a fair number of gulls but being more upriver than the other two sites, it seems to not get as many Casps and today was no exception! Highlight was seeing the regular NTGG ringed Herring Gull V9FT and a 1st-winter (presumably its offspring?) still begging for food!
|adult Herring Gull with 1st-winter begging for food at North Greenwich, London 17th December 2016|
Once the mud had all gone and the Thames gulls had departed, I headed south and gave Burgess Park a punt. I only had a look for the Mediterranean Gull a couple of times last winter (without success), and had already failed once this winter too, so I was pretty happy to find it back - thought it was probably dead! So as I first found it as a second-winter in November 2008, it is now a grand 10 years old...
|adult Mediterranean Gull Burgess Park, London 17th December 2016|