Common Eider

Red ring with a white three alpha code (on left leg).

note 1 : birds have been marked in Cumbria, UK starting July 2019.

note 2 :

Yellow ring with a black two alpha-numeric code.

note 1 : birds ringed in Oslo-fjord, Norway.

note 2 : used codes are : A00 to A99, C00 to C99, E00 to E99 ...

note 3 :

Orange ring with a black 2 alpha code.

note 1 : up to 2014, a total of 226 rings were delivered since 2001.

note 2 :     

Combination of rings.

note 1 :

Combination of 3 c-rings and a metal ring.

note 1 : birds ringed near the Kongsfjorden, Svalbard, Norway.

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

White ring with a 2-alpha code.

note 1 : during summer 2009 breeding female eiders will be marked in the Helgeland region of Nordland county in Norway. The study will concentrate on gathering data on nest site fidelity in common eiders, breeding at traditional "eider farms" where islanders build houses for the ducks, and later harvest the down.

Yellow ring with a black two alpha-code.

note 1 : birds ringed in Kongsfjorden in Svalbard, Norway.