Common Tern

White flag with a black four alpha code, starting letter "S".

note 1 :  

White ring with a black four alpha-numeric code, starting letter "V".

note 1 : 

White ring with a black four alpha-numeric code, starting letter "A" or "E".

note 1 :  

White flag with a black four alpha-numeric code, starting letter "S".

note 1 :  

White flag with a black four alpha code, starting letter "S".

note 1 : 

White ring with black four alpha-numeric code, two I’s (in any position)".

note 1 : ex. are : IIAA, IAI5, ZIIX, and AEII.

note 2 : 

White ring with a black two azlpha code, separated by a black line.

note 1 : 

White ring with a black three alpha-numeric code, starting with 0F0 (zero F zero) to 9F9 (nine F nine) (on right leg) and and metal ring (on left leg).

note 1 : 0F0 - 9F9.

note 2 : birds ringed on Schimmerweiher near Karlshuld near the Danube: colony on a pebble island.

note 3 : 

Yellow ring with a black three alpha code, starting letter "C" (CAA-CZZ) (on left leg) and metal ring (on right leg).

note 1 : birds ringed in Leicestershire, England.

note 2 : 

Green ring with a white three alpha-numeric code and a dot in the code (always after the 1st or 2nd digit in the code).

note 1 : letter 'N' on the first position OR letter 'N' on the 2nd or 3rd position (eg. N.AC or 2N.3).

note 2 : the letter N is followed by one letter and one number (eg. NV2 or N2V), by two numbers (eg. N42), starting with two numbers (eg.01N) or in the number-N-number (eg.7N8)

note 3 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z. Used numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

note 4 : 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 5 :