Sandwich Tern

Light-green/lime 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 : 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 3 : 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 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 :

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 three alpha code, starting letter K (on left leg) and metal ring (on right leg).

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 : birds have been ringed in Norfolk, UK, 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.

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

White ring with a black three alpha-numeric code and metal ring.

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 : 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 6 : 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 7 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 8 :

White ring with a black three alpha code and metal ring (on other tarsus) :
*starting letter "N" or "J" or "H" / number or letter / number or 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)

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 : 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 6 : 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 7 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 8 :

Dark-blue ring with a white three alpha-code, starting letter 'A' (on left tarsus) and metal ring (on right tarsus). 

note 1 : used codes are AAA-AZZ.

note 2 : during 2013, some 169 birds have been ringed near Montpellier, FR.

note 3 : 

Combination of 3 c-rings and metal ring.

note 1 :

White ring with a black three alpha code -starting letter 'H'- (on left tibia or tarsus) and metal ring (on right tibia or tarsus).

note 1 : 240 birds ringed during 2012 in the Languedoc, France.