Gulls

species: 
Herring Gull
scientific name: 
Larus argentatus
EURING code: 
05920
notes: 

Blue ring with a white 4 alpha code and metal ring.

note 1 : an alternating dot is placed  in between the letters. If possible, please note the position of this dot as well as the direction in which the ring was read (up/down).

note 2 : used codes are : AAAA up to ZZAZ, and AAOA up to ZZOZ, always with the letter "A" or “O” at the third position. For example: F.YAK,KA.AD, AL.OF or CRO.Z

note 3 : the letters E, I, Q have not been used.

note 4 : in most cases the ring must be read upwards. Preferably the blue rings were placed at the right tarsus and the metal rings at the left, but there are exceptions.

note 5 : a few  look-alikes with yellowish legs (hybrids as well as pure Yellow-legged Gulls) were cr-ringed as well.

note 5 : 

Images: 
email sighting submit: 
snailmail sighting submit: 
Eric Stienen, Research Institute for Nature and Forest, Kliniekstraat 25, B-1070 Brussels, Belgium.
colour-ring type: 
Legring : one, coded.
colour-ring colour: 
Blue (Dark) [B]
colour-ring code: 
Four alpha code (4 letters).
countries where ringed: 
Belgium.