The crimsonwings (Cryptospiza) are a genus of small passerine birds belonging to the estrildid finch family (Estrildidae). There are four species. They are found in parts of Africa, particularly the Albertine Rift; all four species occur there and two, Shelley's and dusky crimsonwings, are found nowhere else. They are secretive birds which mainly inhabit mountain forests with dense undergrowth. They usually forage on or near the ground, feeding mainly on seeds such as those of grasses and balsam. (source)