1 cy. Yellow-legged gulls (L. michahellis). 26-09-09.

Bird ringed as a chick in the Ebro delta.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09. Some other intemediate examples

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09. This are the birds shoeing most extensive moults.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09. Mainly juvenile looking birds. Late moulting individuals.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09. Herring gull looking individual. In this case, judging the tail patter, the pale coverts seem to be related with any pigmentation problem. In addition, the inner primaries are really dark.

1 cy. Yellow-legged gulls (L. michahellis). 26-09-09. Individual ringed in southern France with pale primary window and overall dark appearance.

Ad. Lesser black-backed gulls (L. fuscus). 26-09-09.

Ad. Lesser black-backed gulls (L. fuscus). 26-09-09. Late moulting individuals

Ad. Lesser black-backed gulls (L. fuscus). 26-09-09.

Bird ringed in Norway.

An old Dutch bird.

Ad. Lesser black-backed gulls (L. fuscus). 26-09-09. Different moult stages

Ad-Near adult Yellow-legged gulls (L. michahellis). 26-09-09.

Ad-Near adult Yellow-legged gulls (L. michahellis). 26-09-09. Different examples

1 w. Mediterranean gull (L. melanocephalus). 26-09-09

1 w. Mediterranean gull (L. melanocephalus). 26-09-09. The ringed bird is from Hungary. Note how juvenile appearance seen in August is beeing lost.

Ad Herring gull (L. argentatus). 26-09-09

After beeing out at Holidays and some days in the Tarragona festivals, today I've been back to the harbour. Many Lesser black-backed gulls, decreasing numbers of Yellow-legged gulls and the first Herring gull. The last looks the same individual observed in the area last 8 winters. According to other years phenology, the individual should be in the area for about one month.

Ad Herring gull (L. argentatus). 26-09-09. Note the differences between Herring and Yellow-legged gull.

Out of the leg colour, note the differences in size and structure, back grey tone, iris colour and primary moult stage.