Gulls

species: 
Black-headed Gull
scientific name: 
Larus ridibundus
EURING code: 
05820
notes: 

Dark-blue ring with a white four alpha-numeric code (starting letter "N" followed by one letter and two numbers).

note 1: code used is NA01-NA00 ; NC01-NC00 ; NE01-NE00 ; NH01-NH00 ; NJ01-NJ00 ; NK01-NK00 ; NL01-NL00 ; NM01-NM00 ; NN01-NN00 ; NP01-NP00 ; NR01-NR00 ; NS01-NS00 ; NT01-NT00 ; NU01-NU00 ; NV01-NV00 ; NX01-NX00 ; NY01-NY00.

Images: 
email sighting submit: 
snailmail sighting submit: 
Dr. Francisco J. Cantos, Ringing office, Subdireccion General de Conservacion de la Biodiversidad, Gran Via de San Francisco 4, 28005 Madrid, Spain.
colour-ring type: 
Legring : one, coded.
colour-ring colour: 
Blue (Dark) [B]
colour-ring code: 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Spain.
First letter: 
N