Yellow-legged Gull michahellis
N5U4
sub-adult, November
23 2003, Rosas, NE Spain. Photo Ruud Altenburg.
Very adult-like michahellis,
except the bill coloration. The orbital ring is red, the iris
is yellow with speckling, the bill and legs are yellow, but the red gonydeal spot doesn't continue on the upper mandible.
There is much black on the bill, a clear indication for immaturity. The mirror on P10 is separated from the white tip
by a complete sub-terminal band. By November, the primary moult is
completed.
This much black might indicate 3cy, but
still no data received on this ringed bird.
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