Progression of an individual Yellow-legged Gull from 2W (3cy) to Adult

© A. R. Dean

Image 36.  5cy.  Early January 2012.

(Image 1 in the series is at 20/01/2010).

Now entering its 5th calendar-year and nearly two years older than when it first appeared at the site. Note small black mark adjoining red spot on gonys.