Parasitic Skua

Light Green ring with a black two alpha-numeric code.

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

Black ring with a white two alpha-numeric code.

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

White ring with a black two alpha-numeric code.

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

Combination of 4 c-rings with an alpha-numeric combination. 

note 1 : alle birds ringed in Britai nand Ireland.

note 2 : used colours are white, black, yellow, green, red and blue. 

note 3 : 

White ring with a black four alpha-numeric code, starting letter "C".

note 1 : up to 2014, a total of 177 rings were delivered since 2008-2011.

note 2 :

Orange ring with a two alpha code. 

note 1 : birds ringed in NE Greenland.

White ring with a three alpha code.

note 1 :

White ring with a black two alpha code.

note 1 :

White ring with a black four alpha-numeric code (stareting letter "J")

note 1 :

Red ring with a two alpha code.

note 1 : birds are ringed in Joatkajávri near Iešjávri and Skirvi peninsula, near Kviby, Finnmark, Norwegian Lapland. This project starts during sumemr 2012.