● North of Madera Canyon [Pima Co], AZ USA [el. 1218 m / 3998 ft] view location in Google Maps » ● 11/03/10 11:23AM sunny, air temp: 25°C / 78°F [IMAGE 2 of 3] At one point, the flash-heads of my macro rig got too close to the P. imberbiculus worker I was trying to photograph. The frightened ant assumed the position you see here, and remained motionless for about 30 seconds before continuing on. ADDITIONAL NOTES/REFERENCES: These ants are quite difficult to image. On both of the occasions during this trip (Nov. 2010) that I observed P. imberbiculus, there were no more than two workers on the surface at any given time. They move along at a modest but steady pace, and pause infrequently (and very briefly). - Pogolumina - Pogonomyrmex Harvester Ants of North America