Pogonomyrmex maricopa and Novomessor albisetosa workers, fighting. Resources are scarce in the desert and competition among ants is fierce, leading to frequent conflicts. Green Valley, Arizona, USA
Pogonomyrmex maricopa harvester ants inspect a mesquite seed. Tucson, Arizona, USA
Pogonomyrmex barbatus red harvester ant worker, carrying a seed back to the nest. Tucson, Arizona, USA
