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 a letter and two numbers). 

note 1 : codes used NB01 to NB99 and NC10 to NC40. Birds were ringed at the Zoo of Barcelona in order to study the wintering ecology of the species.

Images: 
email sighting submit: 
snailmail sighting submit: 
Raül Aymí, Institut Català d'Ornitologia, Museu de Zoologia, 08003 Barcelona, 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