Gulls

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

White ring with a black two alpha code (on left tarsus).

note 1 : used codes are letter/letter (AA-ZZ).

note 2 : a "-" sign is to be read within the codes.

note 2: old yellow rings are turning white, so beware !! But yellow rings are nearly all fallen off.

note 3: white rings from 2011 onwards.

note 4: all birds ringed during winter in city-parks.

note 5: all rings have to be read from bottom to top.
 

website sighting submit: 
European colour ring Birding submit
email sighting submit: 
website information: 
http://www.frankmajoor.nl
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Two alpha code (2 letters).
colour-ring position (of the c-ring): 
Tarsus left.
countries where ringed: 
The Netherlands.