Yellowjackets have a lance-like stinger with small barbs and typically sting repeatedly. Occasionally, the stinger becomes lodged in the victim’s skin and pulls free of the wasp’s body. The venom is primarily only dangerous to those who are allergic, unless a victim receives a large number of stings.
Nests are built in trees, shrubs, or in protected places such as inside human-made structures (attics, hollow walls or flooring, in sheds, under porches, and eaves of houses), or in soil cavities, mouse burrows, and such. Nests are made from wood fiber chewed into a paper-like pulp.