Gulls

species: 
Mediterranean Gull
scientific name: 
Ichthyaetus melanocephalus
notes: 

Dark-blue ring with a white four alpha-numeric code  : starting with the country-code « 5 », followed by 2 numbers and one letter (E, H or J) (on one leg) and metal ring (on other leg).

note 1 : used codes are :
500E, 501E, 502E, 503E, …., 598E, 599E ;
500H, 501H, 502H, 503H, …., 598H, 599H ;
500J, 501J, 502J, 503J, …., 598J, 599J ;

note 2 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Spain.
First letter/number (of the c-ring): 
5