Yellow jackets. These flying insects typically have a yellow and black head/face and patterned abdomen.
Yellow jackets are social insects that live in nests or colonies with up to 4,000 workers. They are most active in the late summer and early autumn when a colony is at its peak. Yellow jackets feed on sweets and proteins, and therefore commonly invade outdoor events.
Yellow jackets can be found anywhere humans are found. They build paper carton nests out of chewed up cellulose, which are usually found in the ground or in cavernous areas such as eaves and attics.