Yellow-legged Gull

White ring with a black four alpha-numeric code, starting letter 'R'.

note 1 : do please pay attention to the colon “R:” as this is very important.

note 2 : the birds are ringed on the Nature Reserve of Lilleau Niges,  Re Island, Charente Maritime department, France.

Red ring with a white four alpha-numeric code, first OR last letter 'G' (=Gipuzkoa)

note 1 : used codes are :
* first letter 'G' : G000 - G999
* last letter 'G' : 000.G - 999.G ; A11:G - Y99:G ; Y00:G ... 11A:G - 00Y:G
* 1A1:G - 0Y0:G
* not used letters : B, E, I, O, Q, S, Z.
* the project runs in Gipuzkoa, Spain but also in Bizkaia and Navarra.

* since 2021 : used codes are : NNL:G, then LNL:G, LLN:G, NLL:G. where N is number and L is letter.
Important : are not used : the letters H, U or A when a letter starts the code.

* since 2024 used codes is LNL:G.

* used codes are : 00A:G-99A:G ; 00C:G-99C:G ; 00F:G-99F:G ; 00H:G-99H:G ; 00J:G-99J:G ; 00K:G-99K:G ; 00L:G-99L:G ; 00M:G-99M:G ; 00N:G-99N:G ; 00P:G-99P:G ; 00R:G-99R:G ; 00T:G-99T:G ; 00U:G-99U:G ; 00V:G-99V:G ; 00W:G-99W:G ; 00X:G-99X:G ; 00Y:G-99Y:G ;

*

Red ring with a white 4 alpha-numeric code (letter 'P' into the code).

note 1 : gulls are ringed since 2012 in central and southern Poland as either breeding adults or chicks.

note 2 : species are L. argentatus (mainly central Poland), L. cachinnans, L. michahellis (mainly southern Poland) and hybrids between these three (everywhere). One L. fuscus and two hybrids L. fuscus x L. argentatus have also been ringed.

note 3 : there are quite many hybrids, not always possible to identify in the field, so please take a digiphoto if possible.

note 4 :

White ring with a blue four alpha-numeric code (3 numbers followed by a colon (:) and ending letter "S"). 

note 1 : birds ringed in Slovakia (ending letter "S").
note 2 : during 2012 60 pulli Larus cachinnans and 1 Larus michahellis were ringed.

Red ring with a white four alpha code (starting letter I).

note 1 : ring to be read from bottom till top.

note 2 : for marking scheme info. , please refer to : stefano.volponi@isprambiente.it

note 3 :

Dark Blue ring with a white four alpha code (starting letter I).

note 1: used codes are IAAA-IJKK at the Tyrrhenian Sea and Sardinia (1996 to 2001).

note 2 : ring to be read from bottom till top.

note 3 : some of these rings are quite worn out so the first letter I is very difficult or not readable anymore (see pictures).

note 4 : for marking scheme info. , please refer to : stefano.volponi@isprambiente.it

note 5 :

Blue ring with white 4 alpha-numeric, starting letter '  K: '.

note 1 : used codes are 001-999. For example : K:007.

note 2 : used codes are 00A-99A. For example : K:02A.

note 3 : birds ringed with a 35mm tall ring, on the right tarsus and metal on the left tarsus.

note 4 : used codes are : note 1 : used codes are K:A1A, K:AA1, K:1AA.

note 5 :