Nests are built using saliva and vegetation. These gray papier mâché homes are attached to a variety of objects including bushes, shed and home eaves, and outdoor storage containers for water hoses and patio cushions. They start out small, but grow quickly and contain chambers for eggs and pupae that are guarded by caretakers. Activity by adults in a particular area is a good sign that a nest has been established nearby.
Red Paper Wasps are great predators of caterpillars in order to feed their larvae. This makes them biological controls that help contain the chewing damage that many species of caterpillars cause on crops. Adults drink nectar from flowers and help pollinate them. Red Paper Wasps are comfortable in a variety environments from wild to urban/suburban.