1-2: © Ruud Altenburg, 14-01-04. Large flock feeding on freshly brought in rubbish and taking off.
3: © Ruud Altenburg, 17-01-04. Spot the L cachinnans!
4: © Ruud Altenburg, 16-01-04. Adult male L cachinnans with several adult L argentatus.
5: © Ruud Altenburg, 15-01-03. L cachinnans (front) with several L argentatus. The white-headed, yellow-legged gull is very difficult to identify, being either a yellow-legged Herring Gull (L argentatus) or a Yellow-legged Gull (L michahellis). It is discussed in more detail under Unidentified gulls.
6: © Mars Muusse, 17-01-04. Group of L argentatus, with yellow and pink-legged birds.
7 © Mars Muusse, 16-01-04. Yellow-legged L argentatus and long-legged L cachinnans!
8: © Ruud Altenburg, 15-01-04. A 2cy Caspian Gull (middle) with two 2cy Herring Gulls.
9: © Mars Muusse, 13-01-04. 2cy female Caspian Gull (left) and 2cy Herring Gull. Note that females may be smaller than argentatus, whereas males (see 10) often are larger and more powerfully build.
10: © Ruud Altenburg, 13-01-04. 2cy Herring Gull (left) and 2cy male Caspian Gull.