Paper Wasp Facts: Nests, Colonies, and Garden Benefits
Paper wasps are slender social wasps that build a single exposed comb from chewed wood fiber. A queen starts the colony in spring, workers expand it and hunt caterpillars, and new queens and males appear later in the season. Their prey hunting can benefit gardens, while a nest near people can create a sting hazard. The safest decision depends more on nest location than on whether wasps are present somewhere in the yard.
Why Are They Called Paper Wasps?
A female scrapes fibers from weathered wood, plant stems, cardboard, or similar material. She chews the fibers with saliva into pulp and spreads it into thin walls. When dry, the material resembles coarse paper.
Paper wasps do not make wax comb or store honey. Their paper is a building material that forms open brood cells, not a food reserve.
What Does a Paper Wasp Nest Look Like?
The nest usually consists of one layer of hexagonal cells attached to a support by a short stalk. The open cell ends face downward or outward, and there is no protective paper envelope around the comb.
Common sites include eaves, porch ceilings, railings, branches, utility boxes, grills, sheds, and other sheltered structures. The exposed comb distinguishes it from the layered, enclosed nest of many yellowjackets and hornets.
How Does a Colony Begin?
In temperate regions, a mated female survives winter in a protected place and emerges in spring. She may found a nest alone or associate with other foundresses. A dominance hierarchy usually leaves one main egg layer while subordinates help.
At first, the queen builds cells, lays eggs, hunts, and feeds larvae herself. This small founding stage is vulnerable to weather, predators, nest loss, and competition.
What Do Workers Do?
The first adult daughters usually become workers. They collect wood fiber and water, enlarge the comb, hunt prey, feed larvae, clean cells, regulate nest temperature, and defend the colony. The queen then concentrates more of her effort on egg laying.
Workers are not sterile in the absolute anatomical sense, and social roles can change if the queen disappears. Paper wasp societies are often described as primitively eusocial because adult females retain more reproductive flexibility than honey bee workers.
What Do Paper Wasp Larvae Eat?
Adults capture caterpillars, flies, crickets, spiders, and other soft prey, chew them into a pulp, and give portions to larvae. Caterpillars are especially common prey for many Polistes.
Larvae can provide adults with nutrient-rich secretions in return. This exchange helps link the protein gathered by hunters with the energy needs of adult colony members.
What Do Adult Paper Wasps Eat?
Adults use nectar, honeydew, ripe fruit juices, and other sugars as fuel. They may pollinate flowers while feeding, although their smooth bodies often carry less loose pollen than a hairy bee.
The prey they catch is mainly for developing larvae. An adult seen cutting up a caterpillar is provisioning the nest rather than eating the entire prey item for its own energy.
How Do Paper Wasps Help a Garden?
Workers search foliage and remove leaf-eating caterpillars, including cabbageworms, along with some flies and other insects. A colony can patrol a broad area repeatedly without a gardener applying a broad insecticide.
Paper wasps do not distinguish a crop pest from a native butterfly caterpillar. Their effect is ecological predation, not targeted pest service. They also become prey for birds, spiders, mantises, and other animals.
How Large Do Colonies Grow?
Paper wasp colonies are usually much smaller than large yellowjacket colonies. A nest may hold dozens of adults, with size depending on species, climate, nest success, food, and season. Some favorable colonies can become larger.
Visible comb size does not reveal every adult because foragers may be away. Even a small nest should not be approached casually.
What Happens at the End of the Season?
Later broods include males and future queens. They leave, mate, and the new queens seek protected winter shelter. The old queen, workers, and males die as cold weather arrives in temperate regions.
The empty nest is not normally reused as the next active colony. Spring queens build new combs, sometimes near a site that still offers shelter.
When Is a Nest a Problem?
A nest far from paths can often stay. A comb beside a door, play structure, handrail, work bench, or allergic person has a higher consequence if disturbed. Professional removal is the safer choice when access or escape is difficult.
For the full split between adult sugar and larval prey, see what paper wasps eat. That diet explains both their flower visits and their garden hunting.
