Yellow-legged Gull - Larus michahellis

(last update: October 08 2013)

Delfín González
Gabriel Martín
Antonio Gutierrez
Amir Ben Dov
Mars Muusse

Yellow-legged Gull michahellis 2CY, April 19 2002, Boulogne-sut-Mer, NW France (50.42N,1.34E).

This bird has replaced the central tail-feather R1 and at the moment, it has R2 missing. The tertials #1-3 are relatively new second generation feathers and especially the third tertial has a neat fringe. Some of the wing-coverts have been replaced as well in the post-juvenile moult: greater coverts #1-3 were moulted, median coverts #1-3 and #6-8 were moulted, the inner 5 lower lesser coverts and 3 lesser coverts were all replaced in the post-juvenile moult. Note the neat white fringe in the third greater covert. In general, even the juvenile wing-coverts look to be still in good condition and the juvenile tail-feathers still show last vestiges of a white band. The feathers didn't suffer from severe weather conditions it seems. About 5-7 upper scapulars are third generation, still second generation-like in appearance.

Primary moult stage, PMS = 1: P1 is missing.