Terns

species: 
Little Tern
scientific name: 
Sternula albifrons
notes: 

Dark-green ring with a white three alpha-numeric code - starting letter "P" followed by two numbers - (on one leg) and metal ring (on other leg).

note 1 :

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): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Poland.
First letter/number (of the c-ring): 
P