Terns

species: 
Sandwich Tern
scientific name: 
Thalasseus sandvicensis
notes: 

Blue ring with a white three alpha-numeric code : starting letter 'A' / number / number (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are A00-A99.

note 2 : in fact this is a white ring with a blue coating.

note 3 : 

website sighting submit: 
European colour-ring Birding submit
email sighting submit: 
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).
colour-ring position (of the c-ring): 
Tarsus right.
countries where ringed: 
The Netherlands.
First letter/number (of the c-ring): 
A