Terns

species: 
Sandwich Tern
scientific name: 
Thalasseus sandvicensis
notes: 

Yellow ring with a black three alpha code, starting letter "S" or "Z".

note 1 : used codes are SAA - SZZ, ZAA-ZZZ.

note 2 :

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 code (3 letters).
countries where ringed: 
Italy.
First letter/number (of the c-ring): 
S or Z