Egrets

species: 
Grey Heron
scientific name: 
Ardea cinerea
notes: 

Yellow ring with a three alpha-numeric code.

note 1 : project began in 1985 and is currently in use.

note 2 : used letters in first position are : A, B, C, F, H, J, K, L, M, N, P, R, T, U, V, W, X and Z. 

note 3 : another project with a yellow ring is very ‘close’ but the differences are :
* c-ring on left tibia.
* metal on right tibia.
The ring is to be read from bottom to top.

note 4 : 

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-numeric code (3 letters/numbers).
countries where ringed: 
Spain.