The grey waxbill or black-tailed waxbill (Glaucestrilda perreini) is a common species of estrildid finch found in wetter land of Southern Africa. It has an estimated global extent of occurrence of .
There are two recognized subspecies:[1]
It is found in subtropical/ tropical (lowland) moist shrubland habitats in Angola, the Republic of Congo, the Democratic Republic of the Congo, Eswatini, Gabon, Malawi, Mozambique, South Africa, Tanzania, Zambia & Zimbabwe. The status of the species is evaluated as Least Concern.