Terns

species: 
Sandwich Tern
scientific name: 
Thalasseus sandvicensis
notes: 

White ring with a black three alpha-numeric code and metal ring (on other leg).

note 1 : used letters are A, C, F, H, J, L, M, N, P, R, T, U, V, W and X.
note 2 : used numbers are 0 - 9.
note 3 : birds ringed since 2018.
note 4 : generally, PVC ring on left tarsus.
note 5 :

email sighting submit: 
email sighting submit (2): 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
colour-ring position (of the c-ring): 
Tarsus left.
countries where ringed: 
Spain.
First letter/number (of the c-ring): 
M