Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull (Larus marinus) JW068 2cy, June 01 & August 07 2011, IJmuiden, The Netherlands. Picture: Maarten van Kleinwee, Jan Zorgdrager, Mars Muusse.

Ringinfo: ringed as pullus on June 30, 2010, at Græsholm, Denmark.





30.06 2010

Græsholm, Hirsholmene, Frederikshavn, Nordjylland, Denmark

57°29'32"N 010°36'30"E

Haupt, Matthias
Pedersen, Kjeld Tommy

05.02 2011

IJmuiden Forteiland, Noord-Holland, The Netherlands

52°28'00"N 004°34'00"E

Verbeek, Kees

01.06 2011

IJmuiden Strand, Noord-Holland, The Netherlands

52°27'28"N 004°33'10"E

Muusse, Mars

08.06 2011

IJmondhaven, IJmuiden, Noord-Holland, The Netherlands

52°27'39"N 004°34'10"E

Verbeek, Kees

01.07 2011

IJmuiden, Halkade, fish market, Noord-Holland, The Netherlands

52°27'34"N 004°35'34"E

Zorgdrager, Jan

07.08 2011

IJmuiden Harbour (Kotterkade), The Netherlands, The Netherlands

52°27'41"N 004°35'01"E

van Kleinwee, Maarten
Zorgdrager, Jan

09.08 2011

IJmuiden, harbour, The Netherlands, The Netherlands

52°27'27"N 004°35'00"E

Verbeek, Kees

below: JW068 2cy, August 07 2011, IJmuiden. Pictures: Maarten & Jan.

All of the mantle feathers and scapulars, as well as most of the feathers in the wing have been replaced by fresh, new generation feathers. Only the lower tertials are missing and a few inner greater coverts have been dropped. P10 is also still first-generation.

below: JW068 2cy, July 01 2011, IJmuiden. Picture Jan Zorgdrager.

below: JW068 2cy, June 07 2011, IJmuiden. Picture Fred Hopman.

below: JW068 2cy, June 01 2011, IJmuiden.

Start of the complete moult. Mc replaced, llc missing.