Lesser Black-backed Gull

Combination of two coded legrings, one on each tibia with a letter or number.

note 1 : rings are placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps. All other combinations with a ring above the knee are also part of this project.

note 2 : Same codes can be used by other large gull species. If you have doubts about the species and/or code, please note the age and position of all the rings, including the metal ring.

note 3 : used letters/numbers are : A, B, C, D, E, F, G, H, J, K, L, M, N, P, R, S, T, U, V, W, X, Y, Z, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + and =. Only the letters I, O and Q are never used

note 4 :

Black ring with a white four alpha-numeric code, ending letter ":L (on left tarsus) and metal ring (on right tarsus).

note 1 : used codes are 001:L ~~ 999:L, 000:L

note 2 :

Dark blue ring with a white four alpha-numeric code, starting letter 'W' followed by a colon ':' and three numbers or two numbers and a letter.

note 1 : used codes are W:001, W:002, ... W:999.

note 2 : birds ringed Cornwall, UK.

note 3 : c-ring position can be either leg.

note 4 : 

Yellow ring with a black four alpha-numeric code, number/number/number / ending letter ":S" (on left tarsus) and metal ring (on right tarsus).

note 1 : 

Dark-green ring with a white 1 letter or number (on both either tibia's).

note 1 : rings are 1,8cm. in height and placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps.

note 2 : the position of the metal ring is right  tarsus.

note 3 : the notation of the rings is G@/G@  (@ can be letter or number)

note 4: always read from left to right tibia.

note 5 :

Orange ring with a black for alpha-numeric code : three numbers followed by ":C" (on left tarsus) and metal ring (on right tarsus).

note 1 : to be read from bottom to top ":C".

note 2 : used codes are : 001:C, 002:C ~~ 999:C, 000:C.

note 3 :

Orange ring with a black four alpha-numeric code, last letter ":C" (on left tarsus) and metal ring (on right tarsus).

note 1 : used codes are : 001:C, 002:C ~~ 999:C, 000:C.

note 2 :

Red ring with a white four alpha-numeric code : starting letter 'K' followed by three numbers.

note 1 : used codes are :
K701-800 (1999)
K801-900 (2000)
K901-000 (2001-2002)
KA01-00 (2001-2003 )
KH01-00 (2003-2004)
KE01-00 (2003-2006)
KN01-KN00 (2006-2008)
KYxx, where “x” is number or letter (since 2020)

note 2 : birds were ringed mainly by Nikolai Yakovets up to 2008.

note 3 : rings could be used on L. cachinnans, L. argentatus, L. fuscus , L. michahellis and hybrids between these four species.

note 4 : both adults and chicks are ringing in breeding colonies.

note 5 : there are quite many hybrids, not always possible to identify in the field, so please take a digit photo if possible.

note 6 :

Yellow ring with a black four alpha code [and between second and third letter a colon ":"]

note 1 : used code : CM:PM

note 2 : project started for graellsii.

note 3 :

White ring with a red four alpha-numeric code : (letter (Z) /letter /number or letter / number or letter).

note 1 : first is the letter is 'Z' , code for Galicia.

note 2 :