Paper wasps
Paper wasps (Polistes spp. and the western paper wasp, Mischocyttarus flavitarsus) make paper, open cell nests which are not covered by a papery envelope. Often these nests are produced under building overhangs.
However, a new species to North America, the European paper wasp (Polistes dominulus), will also nest in small cavities in the sides of buildings, within metal gutters and poles, outdoor grills, and similar items. Paper wasps are more slender-bodied than other social wasps. Most native paper wasps are reddish-brown and marked with yellow, but the European paper wasp is marked with shiny black and yellow, allowing it to be easily mistaken for a yellowjacket.
Paper wasps are beneficial predators of caterpillars and other insects and do not scavenge. However, the habit of the European paper wasp to nest in many locations around a yard has greatly increased the incidence of stings associated with this group of wasps.