Ducks

species: 
Ruddy Shelduck
scientific name: 
Tadorna ferruginea
notes: 

Yellow ring with a black two alpha-code.

note 1 :

colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Two alpha code (2 letters).
countries where ringed: 
The Netherlands.