Terns

species: 
Common Tern
scientific name: 
Sterna hirundo
notes: 

White flag with a black three alpha code.

note 1 : used letters as first letter : A, B, C, E, F ,H , J,K, L, M ,U, V, Y, Z.

note 2 :

website sighting submit: 
Ornithological Station MIZ PAS
email sighting submit: 
colour-ring type: 
Flag : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Three alpha code (3 letters).
countries where ringed: 
Poland.