Brachymyrmex patagonicus is a South American rover ant that is spreading rapidly across the southern and western United States. Here, workers feed from a honey bait. Tucson, Arizona, USA
A Calyptomyrmex piripilis worker rescues a larva when her nest is disturbed by the photographer. The function of the ornate, spatulate hairs is unknown. Kibale forest, Uganda (PSW16850)
