Male (top) and female western hercules beetles (Dynastes granti) on their host plant, an ash tree.
Strategus Rhinocerus Beetles, female (left) and male. Tucson, Arizona, USA.
Onthophagus gazella - Gazelle Scarab. Arizona, USA.
Strategus Rhinocerus Beetle. Tucson, Arizona, USA.
Male (right) and female ox beetles (Strategus sp.), showing the strong dimorphism between the sexes. Males use their impressive horns to fight each other over access to females.