Sandwich Tern

Yellow ring with a black three alpha code, starting letter 'T'.

note 1 : 

Combination of :
* orange ring with a black 3 alpha-numeric code (on left leg)
* metal ring (on right leg).

note 1 : used codes are C00-C99.

note 2 : birds ringed in Cumbria, UK.

note 3 : 

Orange ring with a black three alpha code :
* letter 'V' followed by two letters (on left or right tarsus) and metal ring (on opposite tarsus).

note 1 : used codes 2016-2018 for ad. and pulli are VAA-VZZ.

note 2 : 

Green ring with a white three alpha-numeric code, starting letter 'K'  (on one leg) and metal ring (on other leg).

note 1 : used codes are : K0A-K9Z.

note 2 : birds ringed in Ireland.

note 3 : 

White ring with a black three alpha-numeric code, starting letter 'K' (on one leg) and metal ring (on other leg).

note 1 : used codes are : K0A-K9Z.

note 2 : birds ringed in Ireland.

note 3 : 

White ring with a black three alpha-numeric code, starting lettr 'E' followed by two numbers (on one leg) and metal ring (on other leg).

note 1 : used codes are : E00-E99.

note 2 : birds ringed in Clyde, Scotland, by Clyde Ringing Group.

note 3 : 

Light-green ring with a black three alpha code, starting letter 'E' (on one leg) and metal ring (on other leg).

note 1 : used letters : A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.

note 2 : birds ringed in north-east Scotland by Grampian Ringing Group.

note 3 : 

Red ring with a white three alpha code, beginning letter 'K' (on one leg) and metal ring (on other leg).

note 1 : during 2013 - 2020  182 full-grown, autumn passage, birds were ringed at Ynyslas National Nature Reserve, Wales.

note 2 : used codes are K/ letter/letter. From 2021 will also include K/number/letter and K/letter/number

note 3 :

Yellow ring with a black three alpha code (on one leg) and metal ring (on other leg).

note 1 : used codes are : YAA-YBF, YBH-YJZ, YKA-YPF,

note 2 :

Yellow ring with a black three alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : used codes are : P00-P99.

note 2 :