Brown Hyena - near Lüderitz.
I've only seen this nocturnal creature once, a fleeting shadow in the moonlight.
Elephants - Caprivi Strip, Northern Namibia - it seems they could only fit the trunk on the sign.
Feral Horses near Aus.
Tortoise - Western Cape, S Africa.
Zebra - Namib-Naukluft National Park
Warthog - these guys are solid and hitting one of them can severely damage a small car or cause death if the driver swerves and loses control.
Penguins - Cape Town, S Africa
There are also other signs here asking motorists to check for Penguins under their cars before driving off.
I was surprised to see this sign because I was not aware that there are Giraffe in the Namib-Naukluft National Park - I haven't seen any there though.
This buck has been responsible for many accidents and deaths on Namibian roads.