Common Tern

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 :

Lime ring with a black three alpha code.

note 1 : Always letter 'N' on the first position.

note 2 : The letter N is followed by two letters (eg. NVN or NNV).  

note 3 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 4 : these codes were used in 2020-2021 on both adult and juvenile birds during the breeding season in the southwest of the Netherlands.

note 5 : A joint project of the Research Institute for Nature and Forest (INBO), Bureau Waardenburg and Ringgroup Delta.

note 6 : We use colour-rings in order to gain information on habitat use, juvenile dispersal, age of return and recruitment to the breeding colonies in the southwest of The Netherlands or beyond.

note 7 :