Lesser Black-backed Gull

Dark-green legring with a four alpha code (starting letter "Y").

note 1 : after the "Y" a 'dot' is to be found followed by three letters.

note 2 : birds ringed (irrespective of sex and age) near Ijmuiden, The Netherlands.

note 3 : steel ring on opposite tibia or tarsus

note 4 : some are (presumed) hybrids Lesser Black-backed Gulls x Yellow-legged Gull.

note 5 :

Combination of a coded legring (1 letter or 1 number) (on one leg) and a coded legring (1 or 2 or 3 horizontal lines) (on other leg).

note 1 : this is the former project of Arie Spaans.

Red ring with a white 4 alpha-numeric code : starting letter 'S' followed by a colon = : and number/number/number) (on left tarsus) and metal ring (on right tarsus).

note 1 : example : S:002

note 2 : project begun in 2011 to study survival of rescued / rehabilitated Herring and Lesser Black-backed Gulls. Secret World Wildlife Rescue, East Huntspill, Somerset. England.

note 3 : the rings are 35mm tall with an internal diameter of 11mm for Herring.

note 4 :
 

Yellow ring with a black 4 alpha-numeric code (starting letter 'T' followed by a colon and 3 numbers) (on left leg) and metal ring (on right leg).

Yellow ring with a 4 alpha-numeric code (starting letter 'T' followed by a colon and two numbers and one letter (on left leg) and metal ring (on right leg). 

note 1 : birds ringed n North East Scotland.

note 2 : starting 2011, 310 birds have been ringed by early 2014.

note 3 : 

Black ring with a white 4 alpha-numeric code, ending letter 'M' (on left leg) and metal ring (on right leg).

note 1 : birds are coming out of 2 or 3 revalidation-centers.
note 2 : project is intended to run for 5 years minimum.
note 3 : mostly pulli of L. michaellis, but some on L. fuscus.
note 4 : some birds are ringed with as well c-ring as metal ring on the same leg.

Red ring with 3 alpha-numeric code (starting letter "E" or "F" and 2 numbers) (on one leg) and yellow ring (code E) (on other leg).

note 1 : birds are ringed during June 2004.

note 2 : a project from Norman van Swelm, but contact Roland Jan Buys.

note 3 : 

Red ring with 4 alpha-numeric code (starting letter "E" and 3 numbers) (on one leg) and yellow ring (code E) (on other leg).

note 1 : birds are ringed during June 2004.

note 2 :