A male Agama planiceps shows off his colouring on a rock in Namibia. Ondrej Prosicky/Shutterstock November 10, 2020 How predators may have shaped the way some southern African lizards survive and reproduce Neil Heideman, University of the Free State and Joaquín Verdú Ricoy, University of the Free State By eliminating the less fit individuals over time, predation can drive the population to increasing fitness in terms of survival and reproductive success.