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 1CY 305L November 25 2003, Montpellier, S France. Photo Ruud Altenburg.

305L shows an average amount of replaced wing-coverts and tertials in the post-juvenile moult. All scapulars have been replaced for second generation feathers, including the rear lower scapulars, the ones covering the scapular coverts. In both the upper and lower scapulars, a subsequent moult to third generation feathers has started (1-25% replaced), with the third generation feathers still very second generation-like in their pattern, but again with broad neat fringes indicating freshness.

The partial autumn moult in tertials and wing-coverts:
tertials #1-5 (left wing) and #1-4 (right wing);
greater coverts #1-4,7.9 (left wing) and 1-4,7 (right wing);
median coverts #1-11 (left wing) and #1-13 (right wing);
lower lesser covert #1-11,14,15 (left wing) and #1-10 (right wing)
and most of the visible lesser coverts (90% in left wing; 50% visible and 70% in right wing, 70% visible).

The bill is most dark, with a slightly paler base. All remiges and rectrices still juvenile.