Gulls

species: 
Black-headed Gull
scientific name: 
Chroicocephalus ridibundus
notes: 

White ring with a black four alpha-numeric code.

note 1 : starting letter "Y" followed by 3 numbers.

note 2 : the project started during spring 2006 in Serbia and Montenegro.

email sighting submit: 
email sighting submit (2): 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Serbia.
First letter/number (of the c-ring): 
Y