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, October 01 2001, Le Portel, NW France.

Average moult stage for early October in michahellis: most of the scapulars replaced (except a few feathers in the lowest row) and some inner median and greater coverts moulted. The moult sequence in the lesser coverts is less clear. The most recently moulted feathers have a greyish base, in the older feather this colour turns paler, almost white with a warm brown tone near the tip. 
Note the fine vermiculated pattern on the juvenile central greater coverts, uncommon in michahellis which normally show more prominent barring are notching in these feathers. Most of the head, breast and belly has been moulted to second generation under-parts.