African (Blue-billed/Dark) Firefinch - Lagonosticta Rubricata
Adult male has dark grey from crown to nape, pale pink base to bill, black vent and undertail-coverts. Adult female is paler or less intensely red than male.
Song given by both sexes consists of various ringing notes repeated in a random sequence, interspersed with squeaky whistles, trills, and warbles.
Most frequent calls are a rising trilling twitter, loosely interpreted as 'trrrrrrrr-t', or a simple 'trrrrr', and a loud ringing 'chew-chew-chew'.