The Whistling Rain Frog (Breviceps sopranus) is a species of frog in the Brevicipitidae family. It is found in South Africa, Swaziland, and possibly Mozambique. Its natural habitats are temperate forests, dry savanna, moist savanna, and sandy shores. It is threatened by habitat loss.
This species is known from Mtunzini in KwaZulu-Natal, south-eastern South Africa, north through Swaziland along the Lebombo Mountains to Komatipoort in Mpumalanga Province, in eastern South Africa. It has a relatively large Extent of Occurrence (12,700 km) and Area of Occupancy estimated at 3% of its Extent of Occurrence (381 km). It is a lowland species (0-350 m asl) occurring in flat and hilly areas.