Colobopsis macrocephala, commonly known as the big-headed ant, is a species of ant belonging to the genus Colobopsis. It is characterized by its large head in proportion to its body size, hence its name. These ants are found in tropical regions, particularly in Southeast Asia, and are known for their aggressive behavior and ability to defend their colonies using their powerful mandibles. They are also known to engage in a unique behavior called "exploding ants," where certain workers sacrifice themselves by rupturing their own bodies to release toxic substances as a defense mechanism.