Ad. Bonaparte's gull (L. philadelphia). 18-12-10

Ad. Bonaparte's gull (L. philadelphia). 18-12-10. Some nice pictures taken by Raül Aymí.

1 w. Herring gull (L. argentatus) & 1 w. Yellow-legged gull (L. michahellis), 19-12-10

Note the differences in size, shape and pattern with yellow-legged gull (right)

1 w. Herring gull (L. argentatus) & 1w. Yellow-legged gull (L. michahellis), 19-12-10. A typical individual

Yellow-legged gulls (L. michahellis). 19-12-10. Different ages

In spite the pictures are not very good, note the differnt ammount of grey feathers in 2 w.

1 w. with restricted cobert moult. The previous one is more extense but not much

Adults with a pigeon chick that is still alive

Ad. Bonaparte's gull (L. philadelphia). 18-12-10

Ad. Bonaparte's gull (L. philadelphia). 18-12-10. This is almost sure the same bird from last winter (6-1-10). Pictures from last year are available in the blog (use labels in the right to find the last year pictures). This bird was found the day 16-12-10 in the fishing harbour and has been seen today in the boat trip off Tarragona

2w. Herring gull (L. argentatus), 18-12-10

2 w. Herring gull (L. argentatus), 18-12-10. The same individual from last week seen on a boat trip off Tarragona

1 w. Lesser black-backed gull (L. fuscus), 7-11-10

1 w. Lesser black-backed gull (L. fuscus), 7-11-10. A pale individual with pale primary window and rump. The cobert pattern is pale but odd.

Ad. Lesser-black backed gull (L. fuscus), 16-10-10

Ad. Lesser-black backed gull (L. fuscus), 16-10-10. Note the active moult on this norwegian bird

1 cy. Yellow-legged gull (L. michahellis), 16-10-10

1 cy. Yellow-legged gull (L. michahellis), 16-10-10. Note moulting stage by the age and time of the year. Tail and greater coberts are kikely to be lost, but note second generation median coberts.

2w. Herring gull (L. argentatus), 11-12-10

2w. Herring gull (L.argentatus), 11-12-10. As others seen in Tarragona, a lot of grey in the back

Red-footed booby (Sula sula). 8-12-2010. l'Estartit

Red-footed booby (Sula sula). 8-12-2010. l'Estartit. After some months out of the blog, this is back with a non gull but a nice one. Gulls from Tarragona will come back next weekend

Ad. Lesser-black backed gull (L. fuscus), 7-3-10 and 13-3-10

A dutch guy from 7-3-10

Another dutch from 13-3-10

Herring gull (L. argentatus), 13-3-10

This individual has been seen since November

This is a similar individual to the last one that is present since early January

This very worn individual is present since October

As every year, an adult Herring gull is comming during the end of February and March

1 w. Yellow-legged gulsl (L. michahellis), 13-3-10

1 w. Yellow-legged gulls (L. michahellis), 13-3-10. These individuals have moulted very few coberts but the last has started the primary moult

1 w. Yellow-legged gull (L. michahellis), 11-3-10

1 w. Yellow-legged gull (L. michahellis), 11-3-10. We all know that gulls should be identified in basis of different factors. This is just an example of why pale primary window is not enought to sort out michahellis

2 w. Yellow-legged gull (L. michahellis), 11-3-10

2 w. Yellow-legged gull (L. michahellis), 11-3-10. A nice 2w individual with very few grey feathers and two different generations in the secondaries. This has also started with primary and tail moult.

2 w. Yellow-legged gull (L. michahellis), 27-2-10

2 w. Yellow-legged gull (L. michahellis), 27-2-10. Various examples

1 w. Yellow-legged gull (L. michahellis), 27-2-10