| Index > Gulls in Poland > May > | < Index |
Yellow-legged Gulls
1: © Ruud Altenburg, 17-05-07; 2: © Ruud Altenburg, 23-05-07. Yellow S1NV, ringed as pullus at Zečevo Island, Krk, Croatia on 28-05-06. This 2cy bird and many others on this page show that it's very difficult in May to interpret the extent of the post-juvenile moult the previous summer/autumn, as the feathers are abraded and it's almost impossible to differentiate between juvenile and second generation feathers.
3-4: © Ruud Altenburg, 17-05-07. Yellow ST88, ringed as pullus at Zečevo Island, Krk, Croatia on 28-05-06. Contrary to the bird above, the wing coverts in this bird have been preserved rather well. Picture 4 shows that many lesser and median and some greater coverts have been replaced during the post-juvenile moult.
5: © Ruud Altenburg, 17-05-07. Yellow S1PM, ringed as pullus at Zečevo Island, Krk, Croatia on 28-05-06.
6: © Ruud Altenburg, 17-05-07.
7: © Ruud Altenburg, 21-05-03. A bleached bird that shows which wing coverts and tertials have been replaced during the post-juvenile moult.
8: © Ruud Altenburg, 23-05-07. The wing of this individual seems very 'plain', caused by the absence of the median coverts, which have been dropped as part of the first complete moult.
9: © Ruud Altenburg, 23-05-07.
10: © Ruud Altenburg, 23-05-07. An advanced bird that has already replaced many wing coverts.
11: © Ruud Altenburg, 23-05-07.
12: © Ruud Altenburg, 25-05-07.
13: © Ruud Altenburg, 30-05-03. This individual already has a yellowish bill, which is unusual for a 2cy Yellow-legged Gull.
14: © Ruud Altenburg, 17-05-07. One of the few 3cy birds present.
14: © Ruud Altenburg, 23-05-07. This adult and the bird below were the only adults I observed in 2007. They still outnumbered the adult Caspian Gulls by two!
15: © Ruud Altenburg, 23-05-07.
| Back | Terug |