Egrets

species: 
Grey Heron
scientific name: 
Ardea cinerea
notes: 

Yellow ring with a black four alpha-numeric code (on right leg).

note 1 : starting letter "X" followed by three letters.

note 2 : note that no metal ring was used.

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): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Algeria.
First letter/number (of the c-ring): 
X