Cover photo by Allison Sharp. Find the Giant Bullfrog in the FBIS database (Freshwater Biodiversity Information System) here. Family Pyxicephalidae Identification The Giant Bullfrog Pyxicephalus adspersus is the largest amphibian in southern Africa and the second largest frog species in the world. In Gauteng, males reach a snout-vent length of 245 mm and a mass of 1.4 kg (C.C. unpubl. data.), … Continue reading Giant Bullfrog (Pyxicephalus adspersus)