Combination of :
* white ring with a black three alpha-numeric code (on left tarsus)
* c-ring 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 : used numbers are 0 - 9.
note 3 : used colours in the c-ring are (depending the province) : yellow Cádiz), red (Córdoba), black (Huelva), dark-green (Jaén), purple (Almería), white (Sevilla).
note 4 : birds ringed since 2016.
note 5 :