The red-chested sunbird & x28;Cinnyris erythrocercus& x29; is a species of bird in the family Nectariniidae. It is found in Burundi, Democratic Republic of the Congo, Ethiopia, Kenya, Rwanda, South Sudan, Tanzania, and Uganda. The red-chested sunbird was originally described as Nectarinia erythrocercus by Gustav Hartlaub in 1857 based on specimens from near the White Nile.