Probably ringed as pullus at Zeebrugge, Belgium, tarsus right, upside down, ring code Bruxelles L-82711. Ringed as pullus at Zeebrugge (51.20N 03.11E) on July 01 2000.
An individual with hardly any white tips on the outer primaries, a small white mirror on P10 and black markings on the bill. The orbital ring is red and the iris is white-yellow with some speckling. The red gonydeal spot continues on the upper mandible. Note the many abraded bleached pale brown wing-coverts.