Waders

species: 
Eurasian Curlew
scientific name: 
Numenius arquata
notes: 

Combination of :
- white flag with a black one alpha or numeric code (either on left or right tibia)
- green ring with a white one alpha or numeric code (either on left or right tibia)

note 1 :

colour-ring type: 
Flag : combination of uncoded flag and legring(s).
colour-ring colour (of the c-ring): 
White [W]
countries where ringed: 
Spain.