Gulls

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

Dark-blue ring with a white two alpha code (on left leg).

note 1 : code used is letter/letter (AA-ZZ).

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

note 3 : some 850 birds are ringed from 2000 until 2003. Most of these rings are fallen off.

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

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

email sighting submit: 
website information: 
http://www.frankmajoor.nl/
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
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.