Pogonomyrmex anergismus (at left) is a workerless social parasite of other species of Pogonomyrmex harvester ants. The small queens live deep in the nests of their hosts, taking advantage of their resources to produce more parasite queens and males.  Once a year, in the fall, a crop of young parasites leave their natal nests to mate and locate a fresh host to colonize.  Sycamore Canyon, Arizona, USA
{"Image Make": "\"Canon\"", "Image Model": "\"Canon EOS 20D\"", "Image XResolution": "1", "Image YResolution": "1", "Image ResolutionUnit": "Not Absolute", "Image DateTime": "2006:10:11 09:11:21", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "182", "GPS GPSVersionID": "[2, 3, 0, 0]", "GPS GPSLatitude": "[0, 0, 0]", "GPS GPSLongitude": "[0, 0, 0]", "Image GPSInfo": "340", "EXIF ExposureTime": "1/200", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2006:10:09 21:00:59", "EXIF DateTimeDigitized": "2006:10:09 21:00:59", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ExposureBiasValue": "0", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB"}