Originally from South America, the Argentine ant has become a problematic invasive species of ant worldwide. These dark brown to black colored ants are known to build supercolonies. Colonies form so large because Argentine ants form allegiances with other ant colonies based on their diets to grow their colony.
These ants are problematic due to their invasive nature. As an introduced species with no natural predators, Argentine ants will often overpower native ant species. If allegiances are broken or can’t be made, these ants will take over native ants which disrupts the whole food chain of animals that feed on those ants. Argentine ants feed on a wide variety of foods, especially sweet foods like the honeydew of aphids.