Buntings

Combination of :
* c-ring with code : one letter 'X' above metal ring (on right tarsus) 
* 2 c-rings (on left tarsus). 

note 1 : the c-ring is the marker of  the project.

note 2 : used colours are : white, red, yellow, black, orange, (dark)blue, dark(green), (light)green. 

note 3 : birds of the ssp lusitanica are ringed as this in the northwest of Spain (Galicia).