A harvester ant (Pogonomyrmex desertorum) wanders too close to a nest of little Forelius ants, who harrass the intruder until she leaves. 

Tucson, Arizona, USA
Pogonomyrmex desertorum harvesting seeds from a grass stalk.

Tucson, Arizona, USA
A harvester ant (Pogonomyrmex desertorum) wanders too close to a nest of little Forelius ants, who harrass the intruder until she leaves. 

Tucson, Arizona, USA
Pogonomyrmex desertorum.  Harvester ants sometimes climb up grass stalks to collect seeds.

Tucson, Arizona, USA
Pogonomyrmex desertorum.  Harvester ants sometimes climb up grass stalks to collect seeds.

Tucson, Arizona, USA
Pogonomyrmex desertorum harvesting seeds from a grass stalk.

Tucson, Arizona, USA
Pogonomyrmex desertorum harvesting seeds from a grass stalk.

Tucson, Arizona, USA
Pogonomyrmex desertorum

Tucson, Arizona, USA
Pogonomyrmex desertorum harvesting seeds from a grass stalk.

Tucson, Arizona, USA
A harvester ant (Pogonomyrmex desertorum) wanders too close to a nest of little Forelius ants, who harrass the intruder until she leaves.

Tucson, Arizona, USA
A harvester ant (Pogonomyrmex desertorum) wanders too close to a nest of little Forelius ants, who harrass the intruder until she leaves. 

Tucson, Arizona, USA
A harvester ant (Pogonomyrmex desertorum) wanders too close to a nest of little Forelius ants, who harrass the intruder until she leaves.

Tucson, Arizona, USA
See photo in original gallery.
all images and text © Alex Wild 2001-2013