Combination of :
* blue wingtag (with a three alpha-numeric code : X/number/number or X/letter/number)
* blue three alpha-numeric coded ring (on right leg) and a c-ring (on left leg).
note 1 : used codes are : X00-X99, XA0-XZ9.
note 2 : the wingtag and the c-ring have the same code.