Terns

species: 
Common Tern
scientific name: 
Sterna hirundo
notes: 

Yellow ring with a black three alpha-numeric code (letter/number/number) (on one leg) and metal ring (on other leg).

note 1 : used codes are R01-R99 ; K01-K99,

note 2 : code to be read from bottom till top.

note 3 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Slovak Republic.
First letter/number (of the c-ring): 
R or K