The bronze caco or bronze dainty frog (Cacosternum nanum) is a species of frog in the Pyxicephalidae family, found in South Africa and Swaziland, and possibly Lesotho and Mozambique. Cacosternum nanum is one of the most common frogs in its range. It occurs in a wide range of habitats, including fynbos heathland, savanna, shrubland, grassland, farmland, plantations, rural grassland, degraded forest, and urban areas. They aestivate below the surface or under logs and stones during dry periods, and may emerge in large numbers after heavy rain.