Osprey

Dark-blue ring with a white three alpha-numeric code, starting letter "F" followed by two numbers.

note 1 :

Dark-green with a white three alpha-numeric code : vertical P and two horizontal digits.

note 1 : birds ringed within the Cape Verdean ringing programme.

note 2 : 

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

note 1 : used codes are : letter above number ; A0-A9, ... Y0-Y9.

note 2 : 

Dark-green with a white 3 alpha-numeric code, starting letter 'P' followed by a two alpha-numeric code (letter/number or number/number).

note 1 : numbers and letter 'P' differ on 90°.

note 2 :

Red ring with a white 3 alpha code, starting letter 'C' .

note 1 : up to 2014, a total of 23 rings were delivered since 2013.

note 2 : 

Red ring with a white 2 alpha-numeric code, starting letter 'S' or 'X'.       

note 1 : up to 2014, a total of 13 rings were delivered since 2004-2013.

note 2 :

Red ring with a white 2 alpha code.

note 1 : up to 2014, a total of 311 rings were delivered since 2007-2011.

note 2 :         

White ring with a black 2 alpha-numeric code.

note 1 : starting letters are : 'A' OR 'E'.

note 2 : up to 2014, a total of 5 rings were delivered since 1999-2004.

note 3 : 

Yellow ring with a black 2 alpha-numeric code, starting letter 'Z'.

note 1 : up to 2014, a total 10 rings were delivered since 2013.

note 2 :

Pale-blue ring with a black two alpha code (on left tarsus) and metal ring (on right tarsus).

note 1 : birds ringed from 2016 onwards.

note 2 :