Louis du Preez is a professor of Zoology at North-West University and holds a PhD in amphibian parasitology. He heads the African Amphibian Conservation Research Group. His research focus is on amphibians, especially their conservation, parasites and diseases. He is the author of several books and co-author of the Frogs of Southern Africa mobile app. Vincent Carruthers is a well-known environmentalist and a registered professional scientist specialising in amphibians and wetlands. He is the author of Frogs and Frogging in Southern Africa (Struik Nature) and co-author of the Frogs of Southern Africa mobile app, and has contributed to a range of acclaimed publications.