The Square-tailed Nightjar (Caprimulgus fossii) is a species of nightjar in the Caprimulgidae family. It is found in Angola, Botswana, Burundi, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon, Kenya, Lesotho, Malawi, Mozambique, Namibia, Rwanda, South Africa, Swaziland, Tanzania, Uganda, Zambia, and Zimbabwe.