Army ant colonies typically contain workers of many sizes, each specialized for a different task. Here a Nomamyrmex esenbeckii worker stands guard over a passing column. Gamboa, Panama

Nomamyrmex esenbeckii, carrying a larva. The bright red color indicates a relatively young age for this worker. Gamboa, Panama. filename: Nomamyrmex1

Nomamyrmex esenbeckii Monte Verde, Minas Gerais, Brazil