What are the most aggressive ants in the world?S

When groups of red wood ants interact and fight, the smaller groups fight harder and take more casualties. Ants are one of the few non-human animals that engages in close-contact group battles, and how they fight is directly linked to the makeup of that group.

In a study published this week by the Royal Society, a group of scientists report that the more aggressive your group, the fewer casualties it will have. But this is offset by the danger of fighting larger groups with ensuing greater losses.

So where were the most aggressive ants to be found? In groups where all the ants were large, the entire group was highly aggressive. But small groups spawned the highest levels of individual aggression.

Photo by Tan Hung Meng/Shutterstock