The delicately coloured Blue-capped Cordon-bleu or Blue-Capped cordonbleu (Uraeginthus cyanocephalus) is native to Ethiopia, Kenya, Somalia, South Sudan, and Tanzania in East Africa.
I saw them in Tarangire (red dot) in Tanzania where they were foraging with a mixed flock. Check the Xeno-canto website below to see other people’s sightings of this elegant little bird.
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VIDEO
There are some wild bird videos on IBC which also give more reliable locations to see Cordonbleus.
This one from YT shows a captive Cordonbleu demonstrating foraging methods of his wild cousins.