Synoeca septentrionalis, also known as the warrior wasp, is a species of stinging wasp found in Central and South America. These metallic-looking wasps build their paper nests on trees, with some reaching up to six meters above the ground. They have a complex colony cycle involving multiple queens and workers, and exhibit defensive behaviors like gaster-flagging and drumming to warn off predators. Despite being preyed upon by army ants, these wasps have adapted various strategies to defend themselves and regulate their populations. Additionally, they engage in unique behaviors like cyclical oligogyny and gaster-rubbing for communication during nest movements.