1st w. Lesser-black backed gull (L. fuscus). 01-11-11

1st w. Lesser-black backed gull (L. fuscus). 01-11-11. A pale individual

1st w. Herring gull (L. argentatus). 01-11-11

1st w. Herring gull (L. argentatus). 01-11-11. A dark individual.

Yellow-legged gulls (L. michahellis). 31-7-11. 1st c.y. An individual with pale tail and underwing

Yellow-legged gulls (L. michahellis). 31-7-11. 1st c.y.

Yellow-legged gulls (L. michahellis). 31-7-11. 2nd c.y.

Yellow-legged gulls (L. michahellis). 31-7-11. 3rd c.y.

Yellow-legged gulls (L. michahellis). 31-7-11. Adults

Lesser black-backed gull (L. fuscus). 31-7-11. Various ages

This time of the year, identification of juvenile Lesser black -backed and Yellow legged is complicated and maybe I'm wrong with this juvenile bird. In this case, the head is very small and slender

Black-headed gull (L. ridibundus), 31-7-11. Adult

Mediterranean gulls (L. melanocephalus), 31-7-11. Various ages

Audouin's gull (L. audouinii).31-07-11. Various ages

Juvenile ringed in Iatly

Little gull (L. minutus). 26.3.2011. Various ages

Note the different underwing pattern between the 3rd c.y bird (left) and adult (right).

Little gull (L. minutus). 26.3.2011. Various ages on a boat trip off Tarragona