Rhino security patrol guns. These are compact R5 carbine assault rifles (a weapon that combines a machine gun and a rifle) being used in a patrol to protect rhinoceroses from poachers. Rhinoceros horns are illegally poached and sold for use as ornaments and traditional medicines. Due to extensive hunting for their horns, several rhinoceros species are now highly endangered. Photographed in July 2015, in Hlane Royal National Park, Swaziland.