Yay! Today is FROG FRIDAY!!!! We are featuring the Raucous Toad (Amietophrynus rangeri). The Raucous Toad is a large and stout toad with a blunt head and squared appearance. Their skin is rough and dry with wart-like glandular elevations on the upper side and they have a pair of large and distinctive parotid glands on the neck. The Raucous Toad’s upper body surface is brown with irregular pairs of darker brown patches on the back. A pale vertebral line may be present from the shoulders downwards. The underside is a dirty white with a granular texture. Their loud advertisement call comprises of short, rasping duck-like quacks repeated incessantly at about two per second.
The Raucous Toad occurs in a variety of habitats including farmlands and gardens. It breeds in rivers, streams, dams and ponds, but spends most of its time away from water. Breeding takes place in spring and summer. Males call singly or in groups, generally from an open position along the edge of a water body or from a rock protruding above the water level. Their calls can be heard both day and night, but mainly at night. The eggs are laid in double jelly-like strings each about 5 mm thick, and become wrapped around vegetation and other objects in the water (Du Preez and Carruthers 2009). The eggs develop into free-swimming benthic tadpoles which are dark brown to black in colour and reach a length of 25 mm. Metamorphosis is reported as taking at least five weeks after which the young toads leave the water (Du Preez and Carruthers 2009).
The Raucous Toad occurs through most of South Africa, especially the eastern and southern parts, but avoids the semi-arid to arid areas. You can submit your frog and toad photos to FrogMAP at http://vmus.adu.org.za/ and help us to map the distributions of all the amazing amphibians of southern Africa.
Frog Fridays celebrate the amazing diversity of frogs and toads in the southern African region. Click here to learn more about the Animal Demography Unit.