Do yellow jackets get angry?

Do yellow jackets get angry? Yellow jackets do not get angry in human emotional sense, but they do exhibit aggressive defensive behavior when threatened. They are social wasps that defend nest aggressively, and can become agitated by vibrations, loud noises, or swatting. When one yellow jacket stings, it releases alarm pheromone that signals others to attack, which can appear as collective anger. They are more aggressive than bees, especially in late summer and fall when colony is large and food is scarce, and they are attracted to sweets and meats at picnics, leading to stings. Provoking them by swatting, stepping on nest, or approaching nest can trigger defensive swarming. So while they do not feel anger, they have evolved defensive aggression to protect colony, and will sting repeatedly if they perceive threat. To avoid provoking, stay calm, move slowly away, do not swat, and avoid nests.