1cy Yellow-legged Gull
1: © Ruud Altenburg, 23-11-03. Roses. All visible coverts and tertialsin this 1cy are still juvenile, none have been replaced with second generation feathers in the post-juvenile moult. This type of michahellis, with very dark coverts and therefore looking superficially like Lesser Black-backed Gull (Larus fuscus), was found quite regularly in NE Spain.
2: © Mars Muusse, 23-11-03. Roses. This 1cy has replaced only a few lesser coverts in the post-juvenile moult.
3: © Mars Muusse, 23-11-03. Roses. A bird that didn't look too healthy, which may explain the many missing medians coverts. The base of the bill has become paler.
4: © Ruud Altenburg, 25-11-03. Sète. A French 1cy that hasn't replaced any coverts or tertials.
5: © Ruud Altenburg, 25-11-03. Sète. Slightly more advanced 1cy, which has replaced several greater, median and lesser coverts.
6: © Ruud Altenburg, 23-11-03. Roses. An average looking 1cy which has replaced inner greater coverts, inner median coverts and several lesser coverts. The tertials moved by the wind are second generation.
7: © Ruud Altenburg, 23-11-03. Banyuls-sur-Mer. Besides several greater, median and lesser coverts, this rather bulky 1cy has replaced two upper tertials. The bill-base has turned pale.