Taimyr Gull Larus taimyrensis in the North Sea
During summer tens of thousands non-breeding and or immature gulls stay in the North Sea. From the end of July onwards they leave towards the wintering grounds. A substantial number of these gulls began moulting part of their plumage including part of the primaries and secondaries before they leave the North Sea. On 4th September 2020 a 3CY Taimyr Gull Larus taimyrensis actively moulting primaries and secondaries was briefly seen on the Brouwersdam, Province Zuid-Holland in the SW Netherlands.