Zambia – Deadly Insects – Red Harvester Ant – 1000 Kwacha – 2010 – Proof Colored Coin – The red harvester ant (Pogonomyrmex barbatus) is a large ant common in the southwest United States. Red harvester ants can be aggressive, and have a painful sting that spreads through the lymph nodes, sometimes causing reactions, especially in animals allergic to their venom. They can also bite ferociously.