Common Tern
scientific name: 
Sterna hirundo

Blue ring with a white two numeric code.

note 1 : used numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9.

note 2 : these codes were used in 2010-2013 on both adult and juvenile birds during the breeding season in the southwest of the Netherlands.

note 3 : a joint project of the Research Institute for Nature and Forest (INBO), Bureau Waardenburg and Ringgroup Delta.

note 4 : we use colour-rings in order 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 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Two numeric code (2 numbers).
countries where ringed: 
The Netherlands.