ad Mediterranean Gull/ad Zwartkopmeeuw
1-5: © Ruud Altenburg, 03-04-04. Holterbergweg, Amsterdam ZO. Territorial male Mediterranean Gull (Larus melanocephalus) in the colony of Black-headed Gulls near the Amsterdam-ArenA. Territoriale man Zwartkopmeeuw (Larus melanocephalus) in de Kokmeeuwkolonie bij de Amsterdam-Arena.