Great Skua

Combination of 4 c-rings :
* 2 c-rings and BTO metal ring (on left leg)
* 2 cr-ings (on right leg).

note 1 : birds ringed on St. Kilda.

note 2 : used colours are : white, blue, yellow, dark-blue, black, brown.

note 3 :

Black ring with a yellow four alpha-numeric code.

note 1 : birds ringed on Sule Skerry, UK.

Red ring with a white 2 alpha-numeric code (on left leg) and metal ring (on right leg).  

note 1 : birds ringed in Priest Island, Wester Ross.

note 2 :

Orange ring with black 2 numeric code (number/number) (on left leg) and metal ring (on right leg).  

note 1 : birds ringed in Shetland.