Sandwich Tern

White ring with black code.

note 1 : used codes are AA-ZZ used in the Ebro Delta.

Combination of a yellow ring with a black 3 alpha code, starting letter 'E' (reading down on left tarsus) and metal ring (on right tarsus).

note 1 : rings are yellow with black letters using the letters A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.

note 2 : other colours and numbers may be used from 2011 but the first letter is always E.

note 3 : birds have been ringed in north-east Scotland by Grampian Ringing Group.

note 4 : 160 birds have been ringed with yellow rings (for chicks reared in the colony).

Combination of :
* red ring with a 3 alpha code, starting letter 'E' (reading down on left tarsus)
* metal ring (on right tarsus).

note 1 : rings are red with letters using the letters A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.
note 2 : other colours and numbers may be used from 2011 but the first letter is always E.
note 3 : birds have been ringed in north-east Scotland by Grampian Ringing Group.
note 4 : 160 adults with red or yellow rings.

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

note 1 : letter 'P' is on the lower position.

note 2 : 

Combination of a white ring with a black 3 letter code beginning with E (reading down on left tarsus) and metal ring (on right tarsus).

note 1 : rings are white with black letters using the letters A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.

note 2 : Other colours and numbers may be used from 2011 but the first letter is always E.

note 3 : birds have been ringed in north-east Scotland by Grampian Ringing Group.

note 4 : 200 birds have been ringed at night in autumn 2010 and have included a number of birds ringed elsewhere in the UK and Europe.

Combination of 2 c-rings and metal ring.

note 1 : most probably chicks ringed at the Sands of Forvie NNR at Newburgh, NE Scotland.

note 2 :