Pogonomyrmex occidentalis (Western Harvester Ant)

Pogonomyrmex occidentalis nest. Their typical nest is a mound a foot or more high, covered with gravel. . This one has Arizona's Vermillion Cliffs in the background.  My sunglasses are on top of the mound to provide scale.
Pogonomyrmex occidentalis nest. Their typical nest is a mound a foot or more high, covered with gravel. . This one has Arizona's Vermillion Cliffs in the background. My sunglasses are on top of the mound to provide scale.