Great Black-backed Gull

Yellow ring with a single black letter. 

note 1 : birds ringed in Hampshire, Southern England.

Yellow ring with black four alpha-numeric code (ending letter 'B').

note 1 : birds are ringed near Cambridge (Cambs) or Doncaster (North Notts).

note 2 :

Red ring with a white four alpha-numeric code : first letter 'R' followed by a colon ":" and three numbers.

note 1 : used codes are R:700-R:999.

White ring with a black 4 alpha-numeric code : first letter K.

note 1 : this design of ring usually used for Herring Gull, but some used for Great black-backed Gull also.

note 2 : letter J is not used at second position.

note 3 : aee here for film of this project: http://www.tv21.ru/news/2011/12/02/?newsid=39391

White ring with a black four alpha-numeric code : first letter 'K' followed by 3 either letters or numbers.

note 1 : birds ringed in Murmansk, Russia.

note 2 : further details on this scheme are awaited.

note 3 :   

Red ring with a white 4 alpha-numeric code (starting letter 'H') and metal ring (on other leg).

note 1 : 2010 was HXxx used in DK, examples HX72, HX60.

note 2 : some rings of these codes are used in SH for Larus michahelis and Larus cachinans.

note 3 : rings are to be read from bottom to top, most rings have a “checkpoint”.

note 4 : most Larus marinus have yellow rings beginning with “H”, like H55T, see there.

note 5 : about 30 birds ringed per year since 2005.

Black ring with a white five alpha-numeric code,  starting letter 'C '.

note 1 : up to 2014, a total of 106 rings were delivered since 2000-2005.

note 2 : there can exist small text or check marks (spots) in the code, please, inform them also.

note 3 :

Dyed birds (red/pink) with rhodamine on neck/nape and breast.

note 1 : these gulls will be marked as part of a new project looking at gulls, landfills, local nature reserves and other sensitive areas.

note 2 : birds may be colour dyed with either Rhodamine (pink/red) or picric acrid (yellow) : these sightings should be sent to Andy Baxter at a.baxter@csl.gov.uk

Combination of rings  without code (on left or right tarsus or on left or right tibia).

note 1 : it is necessary to mark the age of the bird.

note 2 : the rings are small, pigeon-type.

note 3 : on left or right tibia is a metal Paris-ring.

Combination of 4 rings.

note 1 : used colours are white, blue, yellow, black, orange, red, pale-green, green.

note 2 : project runs in Bretagne, France during the period 1981-1990.