1 w. possible Yellow-legged gull (L. michahellis), 3-12-09. This looks like a very patterened YLG. The bird is metal ringed, but I'm not able taking any information about the ring.
9 December 2009
1 w. possible Yellow-legged gull (L. michahellis), 4-3-07.
1 w. Yellow-legged gull (L. michahellis), 4-3-07. To me, both Herring and Yellow-legged gull things are visible on this bird, the tail looks YLG like and the primary window looks not not extensive enought for HG, but many thinks in the general aspect look HG like to me.
1 w. possible Yellow-legged gull (L. michahellis), 3-3-07
1 w. possible Yellow-legged gull (L. michahellis), 3-3-07. The tail pattern is the only objective thing pointing to YLG. The moulted coverts do not show the YLG sequence and the fact that some secondaries are lacking and the new central tail make possible a replacement (and no moult) of the coverts. However, the tails is very white with a defined black band. Alltogether make sense identify the bird s a odd pale michahellis.
30 November 2009
Ad. Lesser-black backed gull (L. fuscus), 21.11.09
Ad. Lesser-black backed gull (L. fuscus), 21.11.09. A Dutch colour ringed individualringed in 2005 as a chick
29 November 2009
19 October 2009
1w. Lesser-black backed gull (L. fuscus). 18.10.09.
1w. Lesser-black backed gull (L. fuscus). 18.10.09. A very patterned individual.
15 October 2009
cy. Yellow-legged or Lesser black-backed gulls (L. michahellis or L. fuscus)?. 04-10-09.
1 cy. Yellow-legged or Lesser black-backed gulls (L. michahellis or L. fuscus)?. 04-10-09.
14 October 2009
1 cy. Lesser black-backed gulls (L. fuscus). 04-10-09.
1 cy. Lesser black-backed gulls (L. fuscus). 04-10-09. Two pale individuals.
1 cy, Lesser black-backed gulls (L. fuscus). 04-10-09.
1 cy. Lesser black-backed gulls (L. fuscus). 04-10-09. Some examples
Ad. Lesser black-backed gulls (L. fuscus). 04-10-09.
Ad. Lesser black-backed gulls (L. fuscus). 04-10-09. Some moulting adults
Ad. Lesser black-backed gulls (L. fuscus). 04-10-09.
The first three pictures are from the same individual from Belgium. Graellsii
This individual was ringed in winter in Tarragona some winters ago
This is intermedius from Norway.
Ad. Lesser black-backed gulls (L. fuscus). 04-10-09. Some colour-ringed individuals of known origin and one ringed in winter.
5 October 2009
3 cy Caspian looking gull (Larus sp.). 04.10.09
In spite I first identified the bird as a Caspian gull (Larus cachinnans), some comments have allowed to repair the mistake. Many thanks to Chris Gibbins, Visa Rauste and Theo Muuse!!A short abstract of these comments is written below:
Caspian gull at this age stage should show white mirror on P9 and in this bird this is only visible in P10 (still growing in the 6th picture). In addition, the mantle is dark, the legs are short and the gonys angle is strong. In spite all the big gull species show variation, there are too much “bad” things for Caspian which are more important out of the species range.
However, the pink legs, the dark eye, the head and bill structure neither fit with michahellis. In addition, the extent of black in the primaries (up to P3) and the dark rachis in secondary coverts are also strange.
The final conclusion is that maybe this bird cannot be identified at species level so we left this as an unidentified gull.
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