Terns

species: 
Common Tern
scientific name: 
Sterna hirundo
notes: 

Dark-Blue ring with a white three alphanumeric code (on one leg) and metal ring (on other leg).

note 1 : two numeric and letter K that might be on positions : nKn, nnK, where "n" is a digit 0-9.

note 2 :

email sighting submit: 
contactperson: 
Jelena Kralj,
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Croatia.