Black-headed Gull

Yellow ring with a black four alpha-numeric code : first letter 'U' followed by three alpha-numeric or numeric code.  

note 1 :  used codes are U000 to U999.  

note 2 : during 2013-2018 used near 900 color rings.       

note 3 : birds ringed in different regions of Ukraine.  

note 4 : used code are in 2020-21 : UA00-UA99 ; UC00-UC99, than UE00-UE99 and later  UJ00-UJ99 etc.   

note 5 :

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

note 1 : some of these codes may be used on Common Gulls (Larus canus).

note 2 : 

White ring with a black four alpha-numeric code (starting number "2")

note 1 : several ringers participate(d) on the project : for details and direct contact information for the project leader, please, click on the following link: 

https://app.bto.org/static/files/euring/Black-headed_Gull_UK.pdf

White ring with a black four alpha code, starting letter 'Y' followed by three letters.

note 1 :
 

White ring with a black three alpha-numeric code.

note 1 : 

Yellow ring with a black four alpha-numeric code, starting letter 'Z'.

note 1 : birds ringed from 2012 onwards.

Yellow ring with a black four alpha-numeric code (starting number "2') 

note 1 : several ringers participate(d) on the project : for details and direct contact information for the project leader, please, click on the following link: 

https://app.bto.org/static/files/euring/Black-headed_Gull_UK.pdf

White ring with black four alpha-numeric code (starting letter "A") and metal ring (on other leg).

note 1 : used combinations 2012 till 2017 are : letter/number/number/number OR letter/letter/number/number OR letter/letter/letter/number OR letter/number/letter/letter OR letter/letter/number/letter ... as ex. A001, AC88, AAA4, AA5N, A3NV at Hamburg and Schleswig- Holstein / Germany. 

note 2 : 2016 and following years, codes with 5 characters like AF004, AX567 and AD770 are used.

note 3 : rings are to be read from bottom to top.

note 4 :  codes like AT000 – AT999 will be used 2017 and following years at Austria.

note 5 :  

White ring with a black 3 alpha code.

note 1 : used codes are YYY, etc...

note 2 : used codes LAA to LZZ are used by Frank Majoor : f.majoor5@upcmail.nl.

note 3 :

White ring with a black four alpha code (starting letter T).

note 1 : >1000 birds ringed since 2010.

note 2 : used letters are : A, C, E, H, J, L, M, N, P, R, T, U, V, W, X, Y.

note 3 : adult breeding birds and pulli arde ringed in colony at Przykona Reservoir (Central Poland, wielkopolskie region). Some birds I have ringed also in breeding colony at Rynskie Lake (NW Poland, warminsko-mazurskie region).

note 4 :