U

Yellow ring with a black 3 alpha-numeric code : letter U followed by 2 numbers (on left leg) and metal ring (on right leg).

note 1 : birds ringed in Leicestershire, UK.

note 2 : used codes are U01-U99.

note 3 : birds ringed during 2017.

note 4 :

Red ring with a white four alpha-numeric code : starting letter "U" / number / letter / letter.

note 1 : bird is a revalidation one.

note 2 :

White ring with a black 3 alpha code, starting letter 'U'.

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

note 2 : nestling Sandwich Terns have been ringed on the Farne Islands or Coquet Island, Northumberland, England,  by the Natural History Society of Northumbria and the National Trust and we are very grateful for any sightings.

note 3 :

Yellow ring with a black 3 alpha code, starting letter 'U'.

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

note 2 : nestling Sandwich Terns have been ringed on the Farne Islands or Coquet Island, Northumberland, England,  by the Natural History Society of Northumbria and the National Trust and we are very grateful for any sightings.

note 3 :

Dark-blue ring with a white 3 alpha code, starting letter 'U'.

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

note 2 : nestling Sandwich Terns have been ringed on the Farne Islands or Coquet Island, Northumberland, England,  by the Natural History Society of Northumbria and the National Trust and we are very grateful for any sightings.

note 3 :

Yellow ring with a four alpha-numeric code, starting letter "U" followed by a three numeric code or from 2023 onwards : yellow U + letter + 2 numbers.

note 1 : used codes are U000 -U099.

note 2 : used codes are UA00 ... .

note 3 :

Red ring with a white four alpha-numeric code, starting letter  'U' followed by three numbers (on right tarsus) and metal ring (on left tarsus).

note1 : used codes are : U000-U099.

note 2 :

Light-green ring with a black 3 alpha-numeric code : letter U followed by 2 numbers (on left leg) and metal ring (on right leg).

note 1 : birds ringed in Leicestershire, UK.

note 2 : used codes are U01-U99.

note 3 : birds ringed during 2014 and 2016.

note 4 :

Red ring with a white 3 alpha code, starting letter 'U'.

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

note 2 : nestling Sandwich Terns have been ringed on the Farne Islands or Coquet Island, Northumberland, England,  by the Natural History Society of Northumbria and the National Trust and we are very grateful for any sightings.

note 3 : 

Dark-blue ring with a white 3 alpha code, starting letter 'U'.
note 1 : rings are blue with white letters using the letters A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.
note 2 : this same scheme uses other colours but the first letter is always E.
note 3 : birds have been ringed in north-east Scotland by Grampian Ringing Group and we are very grateful for any sightings.