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adult (argenteus), 2004-2007, IJmuiden, the Netherlands (52.27N-04.33E).
An adult male argenteus ringed in the Netherlands: Arnhem Ringstation 5.277.846. Ringing date is 09 july 1992, at IJmuiden, the Netherlands. It was ringed as pullus.
(argenteus), April 02 2004, IJmuiden, the
male (M1 code), with partner in IJmuiden harbour and showing
territorial behaviour. The
bill has no black markings and the red gonydeal spot is confined to
the lower mandible. The
orbital ring is yellow-orange, the iris is yellow without speckling. The legs are flesh-coloured.
The mirror on P10 merges with the tip, but there are small
triangular spots on the edges. P9 has a complete sub-terminal band
and P5 has a complete sub-terminal band, sharply demarcated.
The black patch between the mirror and the white inner-web (the medial band)
on P10 is very broad along
the edge of the inner-web. Argenteus
normally shows such a broad medial band, where it is restricted in argentatus.
below: 15cy 5.277.846 (argenteus), August 12 2006, IJmuiden, the Netherlands (52.27N-04.33E).
P5-P10 still old, other feathers not scored.
(argenteus), February 18 2007, IJmuiden, the Netherlands (52.27N-04.33E).