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Great Black-backed Gull (Larus marinus)    Gulls, Terns and Skimmers (Laridae)
Svartbag    Gaviota Mayor
Great Black-backed Gull 629    (1 photos)
2011-11-26   Dragør, Amager, Denmark

Young birds fighting for fish.


Great Black-backed Gull 628    (1 photos)
2011-11-26   Dragør, Amager, Denmark

1cy bird in the air with complete unmoulted plumage.


Great Black-backed Gull 627    (1 photos)
2011-11-26   Dragør, Amager, Denmark

Young birds. Fighting for lunch.


Great Black-backed Gull 3218    (10 photos)
2019-10-28   Amager Strandpark, Amager, Denmark

Adult bird in molt with still growing outer primaries and missing outer secondaries. The dark markings on the bill relate to being non-breeding rather than a younger bird.

The bulky size, large bill, dark back and pink feet make it unique. When seen like this only Slaty-backed Gull (Larus schistisagus) can look similar, but is first of all not present in the area, and will normally appear smaller, more slender and with a more intense feet coloration.

As always the back color differs with the light and viewing angle, here looking considerably paler on the bird when flying away.



Great Black-backed Gull 3343    (7 photos)
2020-03-31   Vinkelhuse (Tårnby), Amager, Denmark

Adult scavenging a dead bread in a black plastic bag.

The deep orange eye-ring and gape is probably a result of hormonal preparation for breeding since other adult birds seen on gull-research.org show yellowish eye-ring.



Great Black-backed Gull 3568    (8 photos)
2021-09-29   Amager Strandpark, Amager, Denmark

Very worn bird that I judge to be a 2cy rather than a first year bird.


Great Black-backed Gull 3765    (3 photos)
2021-11-15   Kastrup boldbaner, Amager, Denmark

Adult.


Great Black-backed Gull 3781    (2 photos)
2021-12-06   Dragør Nordstrand, Amager, Denmark

Adult. An individual with very pale almost greenish legs.


Great Black-backed Gull 3780    (2 photos)
2021-12-06   Søstjernen, Amager Strand, Amager, Denmark

Second calendar year. Probably this age by wear.


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