● Old Spanish Trail Rd, near Colossal Cave Mountain Park [Pima Co], AZ USA [el. 1049 m / 3442 ft] view location in Google Maps »
● 11/04/2010 4:05PM sunny, air temp: 26°C / 79°F
At this P. xerophila nest near Tucson, AZ, it was obvious that the minor workers were performing the bulk of the foraging duties. They were frequently accompanied by a small number of majors, however. These large workers were also occasionally seen traveling the foraging trails alone, like this one. They were not observed to be transporting any food items - their duty was apparently to defend the minors.