Terns

species: 
Whiskered Tern
scientific name: 
Chlidonias hybrida
notes: 

White ring with a black three alpha code.

note 1 : code is not ending with letter "X" or  letter "Z".

note 2 :  

website sighting submit: 
Ornithological Station, Museum and Institute of Zoology of the Polish Academy of Sciences.
email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Three alpha code (3 letters).
countries where ringed: 
Poland.