Yellow-legged Gull (Larus michahellis), ad, 20.10.2010, Lakolk Strand, Rømø

This Yellow-legged Gull has darker upperparts than argentatus in direct comparison. Note hove the black on outer primaries reaches the primary coverts on the folded wing

The fresh primaries have smaller white apical spots than the average argentatus and the tip of p6 extends further beyond the longest tertials than seen on most argentatus adding to the long-winged appearance of this species. P9 and p10 are not yet fully grown thus p8 is the longest primary at present

This Yellow-legged Gull has fine needle-thin winter streaks in head centered especially around the eyes, heavy bill with strong colours and red gonys spot reaching lower edge of upper mandible, red orbital ring and warm yellowish iris, strong head profile, yellow legs, slender and long-winged appearance with elongated body profile. There is a black band crossing p5. P9 and p10 are not fully grown