Yellow-legged Gull

Orange ring with a black four alpha-numeric code, numberumber/number/letter ":X".

note 1 :

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 :

Light-green ring with a black four alpha-numeric code : number/letter/number, ending letter ':C'.

note 1 : used letters are  A, B, C, D, F, G, H, J, K, L, M, N, P, R, S, T, U, V, W, X, Y, Z

note 2 : used numbers are 0-9.

note 3 : birds ringed since 2006.

note 4 : ringed birds on the island of Chafarinas.

note 5 :

Dark-green ring with a white four alpha-numeric code (letter "M:" followed by three numbers (on left tarsus) and metal ring (on right tarsus).

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

note 2 :
 

Black ring with a white four alpha-numeric code, starting letter "P" followed by the colon ":" and three numbers.

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

note 2 : ring to be read upwards.

note 3 :

Dark-blue ring with a white three alpha code (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are : ZAA, ZAB ~~ ZZY, ZZZ, then YAA ~~ YZZ ...

note 2 :

White ring with a black four alpha-numeric code (number/number/number/ ":" letter 'A') (on right tarsus) and metal ring (on left tarsus).

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

note 2 : during 2024 the first 53 chicks are ringed.

note 3 : birds ringed in the Divjake-Karavasta National Park and Vjose-Narte Protected Landscape. 

note 4 : 

Yellow ring with a black four alpha code [, thrid letter "P", fourth letter "M" and between second and third letter a colon ":"]

note 1 : used codes are : XX:PM

note 2 : birds ringed on an island in the Ria Formosa Natural Park.

note 3 :

Dark-green ring with a red four alpha-numeric code : (letter (Z) /letter N or M /number or letter / number or letter).

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

note 2 :

Yellow ring with a black 4 alpha-numeric code, starting or ending letter "P".

note 1 : first letter “P:" followed by and three numbers or letters or a combination of them.
note 2 : three numbers or letters or a combination of them before last letter “:P".
Used codes are : 001:P ~~ 999:P, 000:P, then A01:P ~~ A99:P, A00:P, B01:P, etc.
Then 1A1:P, ~~ 0Z0:P, then 01A:P ~~ 00Z:P.

note 3 : NOT used letters : A, B, C, D, E, G, H, J, K, L, M, N, P, R, S, T, U, V, W, X, Y, Z (i.e. excluding E or F, I (i), O and Q).

note 4 :