Gulls

species: 
Herring Gull
scientific name: 
Larus argentatus
notes: 

Yellow ring with a black four alpha-numeric code, starting letters AA followed by two number.

note 1 : birds ringed since 2014 in Stolzenau, Germany.

note 2 : used codes are AA01, AA02 ~~ AA99, AA00.

note 3 : new codes used during 2018 : AB00 to AB99.

note 4 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Germany.
First letter/number (of the c-ring): 
AA or AB