Arum lily frog

Arum lily frog in its favourite day perch

This arum lily frog , who spends the days looking like a pebble which has somehow got into a white arum lily flower, and (we are told by Andrée Masdoorp) runs up and down the window panes at night on little red feet.
 It could be Hyperolius horstockii.

Arum lilies Zantedeschia aethiopica are, of course, indigenous in the area. They are one of those South African plants which have established themselves in various continents.