Lesser Black-backed Gull Green YARY – 20170522

Visit to the gull colony of IJmuiden – 20170515

Adult Herring Gull Green YBDS collecting nesting material – 20170515

Female Herring Gull Green YCHJ – 20170512

Adult Lesser Black-backed Gull Green YBJB with black on all primaries – 20170508

Leucistic adult Lesser Black-backed Gull – 20170501

Visit to the gull colony of IJmuiden – 20170424

Adult Lesser Black-backed Gull Green YBUX back from Morocco – 20170424

Visit to the gull colony of IJmuiden – 20170410

5CY Lesser Black-backed Gull Green YBMT with retarded plumage – 20170410