Gulls

species: 
Herring Gull
scientific name: 
Larus argentatus
notes: 

Blue ring with a white four alpha-numeric code, starting letter 'F', followed by a colon (:) and three alpha-numeric or numberic code (on left tarsus).

note 1 :  

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
colour-ring position (of the c-ring): 
Tarsus left.
countries where ringed: 
United Kingdom.
First letter/number (of the c-ring): 
F