Wasp

Wasp is a broad common name covering thousands of species in the order Hymenoptera, ranging from solitary hunting wasps to highly social colony-builders such as yellowjackets and paper wasps in the family Vespidae. As a group they are defined less by a single appearance and more by a shared body plan: a narrow constriction between thorax and abdomen, membranous wings, and, in females, a modified ovipositor used as a stinger.

Social wasps like yellowjackets are especially notable for their complex colony structure, with a queen founding a paper nest each spring and workers cooperatively raising subsequent broods through summer. Their nests, built from chewed wood-pulp paper, are among the most recognizable insect architecture in temperate regions.

Ecologically, wasps are significant predators of caterpillars, flies, and other insects, making them valuable natural pest regulators, and many species also visit flowers, contributing incidentally to pollination.

• Smooth, shiny exoskeleton (unlike the fuzzy body of bees) with a distinctly narrow, pinched waist between thorax and abdomen.
• Common social species show bold black-and-yellow or black-and-white banding on the abdomen.
• Wings are folded lengthwise along the body at rest, a useful trait for separating wasps from many bees and flies.
• Legs are long and often dangle visibly during flight; lookalikes include hover flies, which mimic wasp coloring but have short antennae, large fly eyes, and only one pair of wings.

Wasps occur on every continent except Antarctica, occupying habitats from forests and meadows to urban gardens and building eaves. Social species build paper nests in cavities, shrubs, or underground, while solitary wasps nest in soil burrows, plant stems, or mud cells. Most temperate species are active from spring through fall, with colonies dying back except for overwintering queens.

Social wasps forage for protein in the form of caterpillars, flies, and other insects to feed larvae, while adults themselves feed largely on sugars such as nectar and ripe fruit. They communicate and cooperate within the colony, defending nests as a group, and can deliver a defensive sting when a nest is disturbed. Solitary wasps instead hunt specific prey, such as spiders or caterpillars, to provision individual nest cells for their young, making the group collectively important predators in garden and woodland food webs.

A mated queen who overwintered alone emerges in spring to found a small paper nest and rear the first batch of worker offspring alone. Once workers mature, they take over nest-building, foraging, and larval care, allowing the colony to grow rapidly through summer with the queen focused on egg-laying. In late summer, the colony produces new queens and males that mate; only the new queens survive winter in sheltered locations, while the rest of the colony, including the founding queen, dies with the onset of cold weather, giving most social wasp species one generation of colony growth per year.