Usually ants of the same species, in different colonies, will fight each other. However, Argentine ants cooperate with each other. Argentine ants can be aggressive to other insects. They can exterminate termite colonies and kill or drive off paper wasps and carpenter bees. One stomach is for itself, while the other is the crop that is used to feed others.
Ants pass messages while they pass food.
To feed and be fed, two ants stand up with their mouths pressed together, and the liquid comes out of one ant's crop and into the other ant's mouth. Secretions called pheromones come with the food. The pheromones are in a form that can be smelled. Because each nest has its own distinct smell, ants can recognize each other with pheromones. The pheromones communicate what jobs need to be done, excitement, or danger.