Terns

species: 
Gull-billed Tern
scientific name: 
Sterna nilotica
notes: 

Light-green /lime  ring with a black two alpha-numeric code.

note 1 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Light Green (Lime) [L]
colour-ring code (of the c-ring): 
Two alpha-numeric code (2 letters/numbers).
countries where ringed: 
Germany.