Gulls

species: 
Caspian Gull
scientific name: 
Larus cachinnans
notes: 

Dark-green ring with a white four alpha-numeric code.

note 1 : used codes are :
- number /letter 'P' /number /number. 
- number / number / letter 'P' / number.
- number / number / number / letter 'P'.

note 2 :

    

website sighting submit: 
Ornithological Station, Museum and Institute of Zoology of the Polish Academy of Sciences.
email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Green [G]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Poland.