Common Raven

Red ring with a single white alpha or numeric code (on left tarsus) and metal ring  (on right tarsus).

note 1 : birds ringed Nottinghamshire, UK.

note 2 :

White ring with one black alpha or numeric code (on left leg) and metal ring (on right leg).

note 1 : birds ringed Nottinghamshire, UK.

note 2 :

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

note 1 : birds ringed Hertfordshire, UK.

note 2 :

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

note 1 : used codes are : "Y" or "Z" / letter / number OR "Y" or "Z" / number / letter.

note 2 : birds ringed in the New Forest, Hampshire.

note 3 :

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

note 1 : codes used BAA-BZZ.

note 2 : birds ringed in the UK, Scotland and North England.

note 3 :

Dark-green ring with a white two alpha-numeric code, starting letter "B" followed by two numbers (on left leg) and metal ring (on right leg).

note 1 : used codes B01-B99.

note 2 :

White ring with black 2 alpha-numeric code (A1, 1A, ...) (on left leg) and metal ring (on right leg). 

note 1 : codes used: letter+number or number+letter.

note 2 : bird ringed in County Mayo & Galway, Ireland.

note 3 :

Dark-blue ring with a white 3 alpha-numeric code (on right leg) and metal ring (on left leg). 

note 1 : used codes are : A+number+number (A00-A99).

note 2 : birds ringed in Suffolk and Norfolk, UK.

note 3 : 

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

note 1 :

Blue ring with a white two numeric code (on one leg) and metal ring (on other leg).

note 1 :