Gulls to the Horizon
A blog about gull observations by a Dutch larophile
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May 2018
4th-calendar year Lesser Black-backed Gull comparison – 20180518
Adult Lesser Black-backed Gull Green YBJB – 20180514
6CY Lesser Black-backed Gull Green YBMT with retarded plumage – 20180409
Primary pattern variation in adult Herring Gull Green YBKC from 2015 to 2018
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