A "Yellow Jacket" is a type of wasp belonging to the family Vespidae. These insects are known for their distinctive yellow and black coloration and are often found in North America. Yellow Jackets are social insects that live in colonies, building nests in various locations, including underground or in wall cavities. They are known for their aggressive behavior, especially when defending their nests. Yellow Jackets are omnivorous, feeding on a variety of foods, including insects, sugary substances, and human food. They play a role in the ecosystem by helping to control pest populations. However, their stings can be painful and may cause allergic reactions in some individuals, making caution important when encountering them.