Adult Herring Gull Green YCHH with pseudo mirror, Thayeri pattern and suspended primary moult – 20180716

Adult Herring Gull Green YCHH showing an interesting combination of a pseudo mirror on P10, a Thayeri pattern on P9 and suspended primary moult (P1 – P3 replaced with all other primaries still present).

IJmuiden Forteiland gull colony, 16 July 2018.

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