Great Skua

Pale-blue ring with black two alpha code (on right leg) and BTO metal (on left leg).

note 1 : birds ringed on St Kilda, Scotland.

note 2 :

Black ring with a white three alpha code, starting letter "A" or "C" (on left leg) and metal ring (on right leg).

note 1 : birds ringed Foula, Shetland, UK.

note 2 :

Dark blue ring with a white three alpha code, starting letter "A" or "C" (on left leg) and metal ring (on right leg).

note 1 : birds ringed on Hermaness, Shetland, UK.

note 2 :

Red ring with a white three alpha code, starting letter "A" or "C" (on left leg) and metal (on right leg).

note 1 : birds ringed on Noss, Shetland, UK.

note 2 :

Orange ring with a black 3 alpha code.

note 1 : birds ringed on Orkney.

note 2 :

Yellow ring with a black 3 alpha code (left leg) and metal ring (right leg).

note 1 : used codes : A / N / letter ; A / P / letter ; B / (A,B,C,D,F,H,I,K,S or X) / letter.

note 2 : birds ringed in the Western Isles, Scotland.

note 3 : 

Dark-green ring with a white three alpha-numeric code (on left leg) and metal ring (on right leg)

note 1 : used codes are (letter+number+number), starting with "A".

note 2 : birds ringed on St Kilda, Hebrides.

note 3 :

Dark-green ring with a white two numeric code.

note 1 : used codes are (number + number).

note 2 : birds ringed around Irish coast line.

note 3 :

Yellow ring with a black two alpha code.

note 1 : birds ringed in Kongsfjorden, Spitsbergen/Svalbard.

note 2 : 

White ring with a black four alpha-numeric code (on left tarsus) and metal ring (on right tarsus).

note 1 : used codes are : 2/letter/number/number ... ex. 2A00-2A99, 2B00-2B99, etc.

note 2 : birds ringed on Fair Isle, Shetland.

note 3 :