The genus Odontospiza is possible monotypic taxon with a single species - Grey-headed silverbill
The grey-headed silverbill (Spermestes griseicapilla), also known as pearl-headed mannikin, is a species of estrildid finch found in eastern Africa, Ethiopia, Kenya, South Sudan, and Tanzania. It has an estimated global extent of occurrence of 400,000 km2. It was formerly usually placed in the monotypic genus Odontospiza as Odontospiza caniceps and sometimes placed in the genus Lonchura.
The grey-headed silverbill is commonly found in dry savanna habitat but never too far away from water. It wanders widely, influenced by weather and shifting availability of sources of water.