Terns
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 :