The mammals most likely to be seen are baboon, klipspringer, mongoose and dassie which are all daytime feeders.  Others such as porcupine, genet, hare and grysbok are nocturnal and their presence is only revealed by evidence such as spoor, droppings or effect on vegetation.

Several species of rodent make their home here, including the Cape Spiny mouse Acomys subspinosus which is locally common. The relatively limited number of mammalian species and their small populations reflect the low carrying capacity of the fynbos which covers most of Fernkloof.

Land Mammals of Southern Africa, A Field Guide. Smithers, R.H.N. 1986. Illustrations by Clare Abbot Published by Macmillan South Africa.