Common Tern

Red ring with a white line (on top or middle) and a two alpha code (on right tarsus) and metal ring (on left tarsus).

note 1 :

Red ring with a white line (on top or middle) and a two numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

Red ring with a white line (on top or middle) and a two alpha-numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

Yellow ring with a black line (on top or middle) and a two alpha code (on right tarsus) and metal ring (on left tarsus).

note 1 :

Yellow ring with a black line (on top or middle) and a two numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

Yellow ring with a black line (on top or middle) and a two alpha-numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

White ring with a black line (on top or middle) and a two numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

White ring with a black line (on top or middle) and a two alpha code (on right tarsus) and metal ring (on left tarsus).

note 1 :

White ring with a black line (on top or middle) and a two alpha-numeric code (on right tarsus) and metal ring (on left tarsus).

note 1 :

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

note 1 : birds ringed in UK, county Surrey.

note 2 : used codes are : C00 – C99

note 3 :