The mottled swift (Tachymarptis aequatorialis) is a species of bird in the swift family, Apodidae. It is one of two species in the genus Tachymarptis together with the alpine swift (T. melba). It occurs widely in eastern Africa and locally in western Africa. It is found in Angola, Burkina Faso, Burundi, Cameroon, Central African Republic, Chad, Democratic Republic of the Congo, Ivory Coast, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Kenya, Malawi, Mali, Mozambique, Nigeria, Rwanda, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Zambia, and Zimbabwe.