African-black-beetle African-lawn-beetle appearance beetle black black-beetle bug color colour destructive granit-background granite hard hardy hemiptera heteronychus-arator insect lawn-infestations lawns legs persistent pest species surface beach sand animal black bug injured isolated leg stag armour nature small antenna china Coleoptera desert Tengger animals armor claw closeup dark detail Dynastinae grisly hair hook macro Oryctes rhinoceros pincer resistant rhino beetle Rhinoceros Beetle scale scarab beetles Scarabaeidae scary tenacious tough tuft