Terns
Blue ring with a white three alpha-numeric code starting with an N, in combination with 2 numbers the N can be on the 2nd or 3rd position.
note 2 : the letter N is followed by one letter and one number (eg. NV2 or N2V) or by two letters (eg. NVN or NNV).
note 3 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z. Used numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9,0
note 4 : these codes were used from 2013 onwards on both adult and juvenile birds during the breeding season in the southwest of the Netherlands.
note 5 : a joint project of the Research Institute for Nature and Forest (INBO), Bureau Waardenburg and Ringgroup Delta.
note 6 : we use colour-rings to gain information on habitat use, juvenile dispersal, age of return and recruitment to the breeding colonies in the southwest of The Netherlands or beyond.
note 7 :