Terns

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

White ring with a black two alpha code (on left tarsus) and metal ring (on right leg).

note 1 : used letters are : A, C, F, H, J, L, M, N, P, R, T, U, V, W and X.

note 2 : birds ringed since 2021.

note 3 : generally, PVC ring on left tibia.

note 4 :

website sighting submit: 
Oficina de Anillamiento
email sighting submit: 
website information: 
Oficina de Anillamiento
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Two alpha code (2 letters).
countries where ringed: 
Spain.