Gulls
species:
Black-headed Gull
scientific name:
Chroicocephalus ridibundus
notes:
Dark-blue ring with a white four numeric code (starting number "2").
note 1 : several ringers participate(d) on the project : for details and direct contact information for the project leader, please, click on the following link:
https://app.bto.org/static/files/euring/Black-headed_Gull_UK.pdf
colour-ring type:
Legring : one, coded.
colour-ring colour (of the c-ring):
Dark Blue [B]
colour-ring code (of the c-ring):
Four numeric code (4 numbers).
First letter/number (of the c-ring):
2
