Great Black-backed Gull (Larus marinus)
(last update: July 12, 2015)
Great Black-backed Gull J42A (Larus marinus) 2cy: February 04 2003, IJmuiden, the Netherlands (52.27 N, 4.33 E).
Note the juvenile wing-coverts and tertials. The recently moulted second generation scapulars show an anchor pattern, a broad white fringe and a 'ginger'-coloured base. Some scapulars were moulted quite a while ago and show wear in the fringes. The lowest row of scapulars still consist mainly of juvenile feathers. Ring data, see below.
In case you find blue ringed Great Black-backed Gulls, you can send your information to: Lista Ringing Group, Box 171, 4558 Vanse, Norway or on e-mail firstname.lastname@example.org.
CR-Code Blue with white code J42A
04.02.2003 IJmuiden, Noord-Holland, NETHERLANDS 52.28 N - 04.35 E Mars Muusse