Swans

species: 
Mute Swan
scientific name: 
Cygnus olor
notes: 

Yellow ring with a black four alpha code (on one leg) and metal ring (on other leg).

note 1 :  used codes are : CAAA-CZZZ.

note 2  not used letters are : E, G, M, O, Q, R, U, W and Y.

note 3:  this oroject started during 2015.

note 4 : 

email sighting submit: 
email sighting submit (2): 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha code (4 letters).
countries where ringed: 
Ireland.
First letter/number (of the c-ring): 
C