Sandwich Tern

Orange ring with a black three alpha-numeric  code (on one leg) and metal ring (on other leg). 
* number / letter 'V' / number.
* letter 'V' / letter / number.
* letter 'V' / number / letter.

note 1 : 

Light-green/lime ring with a black three alpha code and metal ring (on other tarsus).

note 1 : first letter always "N" followed by two letters (NAZ) OR two numbers (N09)  OR one number and one letter (N2S or NS2).

note 2 : for the lime rings : in 2014 so far 10 adult birds were ringed during the breeding season, in the next month we expect to ring at least several hundred juveniles.

note 3 : a joint project of the Research Institute for Nature and Forest/INBO, Bureau Waardenburg and Ringgroup Delta. This project will run for at least one more year but reports will be replied to after this time as well.

note 4 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 5 : IMPORTANT: Lime rings were used in 2014, in 2020 many lime rings show signs of wear. The colour of the ring fades to white, and the coding becomes ‘fat’.

note 6 :

Dark-green ring with white three alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : used codes are : K00-K99.

note 2 : 

White ring with a black three alpha code, starting letter "F" (on one leg) and metal ring (on other leg).

note 1 : in this project no birds were ringed yet.

note 2 :

Yellow ring with a black three numeric code, starting numner '2'.

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 :

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

note 1 : used codes are : KAA-KZZ.

note 2 : used letters are : A, B, C, D, F, H, J, K, L, N, P, S, T, V, Z.

note 3 :

White 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 three alpha code, first letter 'T'.

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

note 2 : 

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 :