Black-headed Gull
scientific name: 
Chroicocephalus ridibundus
EURING code: 

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 : 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 :  

email sighting submit: 
snailmail sighting submit: 
Dr. Sönke Martens, Carl Gördelerweg 16, D-25524 Itzehoe, Germany.
colour-ring type: 
Legring : one, coded.
colour-ring colour: 
White [W]
colour-ring code: 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
First letter: