Yellowjackets and paper wasps may become aroused and attack in defense of their nest when disturbed and can be pests when they build a nest on or near your house. Nests of most species are placed underground in rodent burrows or other soil cavities and colonies attain maximum size in August and September. Worker yellowjackets, then at their peak, become pestiferous.
Yellowjackets may be attracted in large numbers to food at picnics, to honey bee colonies, and to garbage cans.
Submitted by: Dave Pehling, Octobr 23, 2017.