Sandwich Tern

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 :

Blue ring with a white three alpha-numeric code : starting letter 'A' / number / number (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are A00-A99.

note 2 : in fact this is a white ring with a blue coating.

note 3 : 

Yellow ring with a black three alpha-numeric code : starting letter 'A' / number / number (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are A00-A99.

note 2 :

White ring with a black three alpha-numeric code : starting letter 'A' / number / number (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are A00-A99.

note 2 :

Yellow ring with a black three alpha code and metal ring (on other tarsus) : starting letter "N" / letter / letter.

note 1 : Always letter 'N' on first position; followed by one letter and one numeric (e.g. NV2 or N2V); or one numeric and one numeric (e.g. N12); or one letter and one letter (e.g. NVT)

note 2 : Always letter ‘H’ on first position; followed by one letter and one numeric (e.g. HV2 or H2V); or one numeric and one numeric (e.g. H12); or one letter and one letter (e.g. HVT)

note 3 : Always letter ‘J' on first position, followed by one numeric and one numeric (e.g. J12); or one letter and one numeric and a ‘.' [dot] in the code in a random position (either between first and second digit, or between second and third) (e.g. J.2T or J2.V); or one letter and one letter (e.g. JVT)

note 4: The letter 'N' on various positions in the code, always starting with a numeric and followed by a letter (e.g. 2NC) or starting with numeric and numeric followed by N (e.g. 23N).

note 5 : Always numeric ‘2' on first position and a ‘.' [dot] in the code in a random position (either between first and second digit, or between second and third); followed by one numeric and one numeric (e.g. 2.25); or one letter and one numeric  (e.g. 2.2T or 22.V); or one letter and one letter (e.g. 2.VT or 2V.T)

note 6 : a joint project of the Research Institute for Nature and Forest/INBO, Bureau Waardenburg and Ringgroup Delta. This project started in 2010 and each year (except in 2011) both adults and juveniles have been colourringed.

note 7 : we use colour-rings in order to gain information on migration, habitat use, juvenile dispersal, age of return and recruitment to the breeding colonies in the southwest of The Netherlands or beyond.

note 8 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 9 :

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

note 1 : Always letter 'N' on first position; followed by one letter and one numeric (e.g. NV2 or N2V); or one numeric and one numeric (e.g. N12); or one letter and one letter (e.g. NVT)

note 2 : Always letter ‘H’ on first position; followed by one letter and one numeric (e.g. HV2 or H2V); or one numeric and one numeric (e.g. H12)

note 3 : Always letter ‘J' on first position, followed by one numeric and one numeric (e.g. J12); or one letter and one numeric and a ‘.' [dot] in the code in a random position (either between first and second digit, or between second and third) (e.g. J.2T or J2.V)

note 4: The letter 'N' on various positions in the code, always starting with a numeric and followed by a letter (e.g. 2NC) or starting with numeric and numeric followed by N (e.g. 23N).

note 5 : Always numeric ‘2' on first position and a ‘.' [dot] in the code in a random position (either between first and second digit, or between second and third); followed by one numeric and one numeric (e.g. 2.25); or one letter and one numeric  (e.g. 2.2T or 22.V); or one letter and one letter (e.g. 2.VT or 2V.T)

note 6 : a joint project of the Research Institute for Nature and Forest/INBO, Bureau Waardenburg and Ringgroup Delta. This project started in 2010 and each year (except in 2011) both adults and juveniles have been colourringed.

note 7 : we use colour-rings in order to gain information on migration, habitat use, juvenile dispersal, age of return and recruitment to the breeding colonies in the southwest of The Netherlands or beyond.

note 8 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 9 :

Orange ring with a black three alpha-numeric code :
* letter 'V' can be in first, second or third position (on left or right tarsus).
* metal ring (on opposite tarsus).

note 1 : during breeding season 2015, 100 nestlings were ringed on the island of Griend, Netherlands Waddensea.

note 2 :

Yellow ring with a black three alpha-numeric code.

note 1 : used codes are T00-T99, 0T0-9T9, 00T-99T ... so always letter 'T' on various positions.

note 2 : birds ringed on the colony of 'Utopia' on Texel, The Netherlands end of June 2014, 15 and 16.

note 3 :

White ring with a black 3 alpha-numeric code, middle letter 'G'.

note 1 : codes used : 0G1-9G9.

note 2 : birds will be ringed in the Gambia.

note 3 :

White ring with a black 3 alpha-numeric code, starting letter 'G'.

note 1 : codes used : G01-G99.

note 2 : birds are ringed in the Gambia starting 2011.

note 3 :