Scientists often refer to frogs as “bio-indicators”, meaning their health reflects the overall health of their environment. Because their skin absorbs water directly from their surroundings, they are extremely sensitive to pollution and habitat changes. A thriving frog population is therefore a good sign, making their presence around Madikwe’s waterholes encouraging for the reserve.

One of the species occasionally spotted around Madikwe’s water sources is the African Bullfrog, one of the continent's largest frogs. Males can reach over 20 centimetres in length and are famous for their deep calls. During breeding season, they inflate their vocal sacs dramatically to project their calls for would-be mates; a sight (and sound!) that never fails to impress guests encountering it on walks back to their room.

In the frog world, attentive fathers are rare, but the African Bullfrog is one exception. After eggs hatch into tadpoles, males often stay close by to guard them. If the pool begins to dry up, he may even dig channels that guide the tadpoles safely toward deeper water.

Many frog species in the bushveld spend long periods hidden underground during dry spells. Some, including the African Bullfrog, can remain buried in the soil for months until the first heavy summer rains arrive. When the rains come, they emerge almost overnight, filling the night with their calls as breeding then begins.

From the nasal quacks of the Foam-Nest Tree Frog to the deeper croaks of the African Red Toad, frog calls are an inherent part of the bushveld’s nocturnal soundscape. Each species has its own distinct call, allowing potential mates to locate each other in the darkness. And to the trained ear of a ranger, this night-time chorus can reveal exactly which species are present around a waterhole.
 
Though they may be small, frogs play an important role by controlling insect populations and also serving as food for birds, snakes, and other wildlife. So the next time you find yourself listening to the night choir at The Royal, take a moment to appreciate the tiny singers hidden among the reeds. Beyond the background music, their calls are a reminder that even the smallest creatures help keep this ecosystem in balance.