Finland.

Black ring with white 2 numeric code (on one leg) and metal ring (on other leg).

note 1 : up to 2014, a total of 70 rings delivered since 2011.

note 2 :

Red ring with white 2 alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : the 2 alpha-numeric code consists of 1 letter and 1 number.

note 2 : up to 2014, a total of 50 rings delivered since 2008.

note 3 :

Combination of :
* yellow ring with a black three alpha-code (on left tarsus)
* 1 c-ring (on right tibia). 

note 1 : right tarsus : metal ring ; left tarsus : yellow coded ring with three black letters ; right tibia : marker colour ring, could be orange or dark pink.

note 2 : used codes consist of three letters, ten different letters used.

note 3 : birds were ringed either on their breeding grounds in Kilpisjärvi in Finnish Lapland (dark pink marker ring) or on migration stop-over/wintering site in Jurmo Bird Observatory in the archipelago in south-western Finland (orange marker ring).

note 4 : location of the ringing sites on a map :
http://maps.google.com/maps/ms?ie=UTF&msa=0&msid=218126239832198286264.0004ad5e542ac5c99e7d6

note 5 : between 2011 and 2014, 200 individuals were ringed.

note 6 :

Combination of a uncoded wingtag (two colours on each wing) and a white ring with a black 3 alpha-numeric code (starting letter "C").

note 1 : used colours are : white, orange, green, yellow, blue, gray.
note 2 : each bird has an unique combination.
note 3 : birds are marked with thes wingtags because they are equipped
with geolocators that need to get back in order to dowload the data. Therefore
all the sightings of these birds are especially valuable !
note 4 : birds can be succesfully reported by only reading the tag and not necessary the colour-ring.    
note 5 : project runs since 2011.

White ring with black 3 alpha-numeric code (starting letter "C").

note 1: about 1100 since 2008 ringed.

Red ring with a white 5 alpha-numeric code, starting letter 'C' followed by number/number/number/letter.

note 1 : up to 2014, a total of 595 rings delivered since 1998.

note 2 :

Orange ring with a black 4 alpha-numeric code (starting letter 'C').

note 1 : Up to 2014, a total of 100 rings are delivered 2002-2013.

note 2 :

Yellow ring with a black 4 alpha-numeric (starting letter 'K')

note 1 : KJxx or KJxxx  (where x is number or letter).
note 2 : 300 birds ringed in Russian Karelia during 2001-2007, most without metal ring.

Yellow ring with a black 4 or 5 alpha-numeric code (starting letter 'C').

note 1 : few ring with code Cnn, the rest with code Cnnn or Cnnx and Cnxnn or Cnnxx (where n is a number and x a letter).
note 2 : 2900 rings were used during 1996-1998 and 900 rings with 5 character codes 2006-2007.

Black ring with white 5 alpha-numeric code (starting letter 'C').

note 1 : up to 2014, a total of 800 rings delivered 1997-2004.

note 2 :