Skuas

species: 
Parasitic Skua
scientific name: 
Stercorarius parasiticus
notes: 

White ring with a black four alpha-numeric code (stareting letter "J")

note 1 :

website sighting submit: 
http://www.ringmerking.no/cr/
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: 
Norway.
First letter/number (of the c-ring): 
J