An adult bird ringed in the U.K: ringed as pullus on 02 July 1989 at Woodbridge, Suffolk, GB (52° 4' 47 , 1° 34' 12), opposite Westkapelle on the other side of the North Sea.

Typical British graellsii with medium grey upper-parts. The complete moult is still not finished by late October with P8 fully grown and all old primaries dropped. P9 levels P6.