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2cy Caspian Gulls

1: © Ruud Altenburg, 17-05-07. An individual with rather dark juvenile wing coverts and already some adult-like scapulars.

2: © Ruud Altenburg, 17-05-07. This bird seems to have retained most of its juvenile wing coverts and tertials. Some median wing coverts have been dropped.

3: © Ruud Altenburg, 17-05-07. An impressive male. The outer wing has bleached to almost pure white.

4: © Ruud Altenburg, 17-05-07. Most of the median coverts have been dropped.

5: © Ruud Altenburg, 17-05-07. This bird shows rather strongly marked scapulars.

6: © Ruud Altenburg, 17-05-07.

7: © Ruud Altenburg, 17-05-07; 8: © Ruud Altenburg, 23-05-07. Red KE74, ringed as pullus at Gatovo, C Belarus on 19-06-06.

9: © Ruud Altenburg, 17-05-07; 10: © Ruud Altenburg, 23-05-07. Red KN48, ringed as pullus at Gatovo, Belarus on 14-07-06. Both birds have been ringed in a roof-top breeding colony as belonging to the Larus argentatus-complex.

11: © Ruud Altenburg, 17-05-07. Green 113P, ringed as pullus at Jankowice, SE Poland. Further details will be added when I receive them.

12: © Ruud Altenburg, 17-05-07.

13: © Ruud Altenburg, 17-05-07. This is a rather advanced bird in which all median coverts and some lesser coverts have already recently been replaced.

14: © Ruud Altenburg, 17-05-07. This individual too is actively moulting: note the new lesser and median coverts and the mising block of greater coverts. A large bird, so probably a male.

15: © Ruud Altenburg, 17-05-07.

16: © Ruud Altenburg, 17-05-07. The last two birds on this page demonstrate that not all Caspian Gulls have a pencil-like bill!

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