A harvester ant worker (Pogonomyrmex rugosus) pulls grass seeds off the stalk. Ants store the seeds in underground chambers to carry them through times of drought. Tucson, Arizona, USA
Two harvester ants (Pogonomyrmex rugosus) from adjacent nests engaging in ritual warfare, pushing in a display of force but not actually harming each other. It is thought that colonies use these mock battles to gather information about their neighbors. Knowledge about the strength of competing colonies helps ants set territorial borders without loss of life. Tucson, Arizona, USA
Pogonomyrmex barbatus alate queen. Sycamore Canyon, Arizona, USA
