Gulls
species:
Black-headed Gull
scientific name:
Chroicocephalus ridibundus
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.
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.
Images:
First letter/number (of the c-ring):
N
