Swans

species: 
Mute Swan
scientific name: 
Cygnus olor
notes: 

White legring with a black four alpha-numeric code (letter/number/number/number) and metal ring (on the other leg).

note 1 : used codes are :  A000-A999, C000-C999, E000-E999 and H000-H999 and J000-J999 and K000-K999.

note 2 : 
 

website sighting submit: 
Tracking Marked Geese and Swans.
email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
The Netherlands.