Feral pigeon

Dark-green ring with a white two alpha code (on right tarsus).

note 1 : used letters : A, B, C, D, F, H, I, J, K, L, N, P, S, T, V, X, Z.

note 2 :

Blue ring with a white two alpha code (on right tarsus).

note 1 : used letters : A, B, C, D, F, H, I, J, K, L, N, P, S, T, V, X, Z.

note 2 :

Black ring with a white two alpha-numeric code (letter/number) (on right tarsus) and metal ring (on left tarsus).

note 1 : code to be read vertical : letter/number.

note 2 : used colours are red, white, yellow and black.

note 3 : 

White ring with a black two alpha-numeric code (letter/number) (on right tarsus) and metal ring (on left tarsus).

note 1 : code to be read vertical : letter/number.

note 2 : used colours are red, white, yellow and black.

note 3 :  project started in 2018 till know.

note 4 :

Yellow ring with a black two alpha-numeric code (letter/number) (on right tarsus) and metal ring (on left tarsus).

note 1 : code to be read vertical : letter/number.

note 2 : used colours are red, white, yellow and black.

note 3 : project started in 2018 till now.

note 4 :

Red ring with a white two alpha-numeric code (letter/number) (on right tarsus) and metal ring (on left tarsus).

note 1 : code to be read vertical : letter/number.

note 2 : used colours are red, white, yellow and black.

note 3 :  rings/codes used in 2016 - 2018.

note 4 :