Hornet (true hornets and hornet-like vespines)

Distribution and habitat

True hornets of the genus Vespa are native to parts of Europe, Asia and Africa. Large vespine wasps called hornets or hornet-like occur in the Americas as native or introduced species. Hornets occupy a range of habitats including warm, wet forests, temperate woodlands, urban and suburban edges and, in some species, dry or desert-like areas. They are generally absent from regions that are cold year-round.

Identification and life cycle

True hornets can be distinguished from related vespines by head shape and body proportions; coloration and markings also help separate species. Colonies start when a mated queen founds a nest in spring or the local wet season. Workers rear brood and expand the nest. In temperate zones colonies often follow an annual cycle with new queens hibernating or overwintering to establish nests the next year; in tropical areas some species may maintain longer-lived colonies.

Behavior and ecological role

• Diet: adults commonly feed on nectar and tree sap, while workers hunt insects and other arthropods to provision larvae, so hornets act as predators of many pest species.
• Defense and sting: hornets defend nests vigorously and can sting repeatedly; venom is painful and can cause severe allergic reactions in susceptible people.
• Ecosystem services: as predators and scavengers they influence insect community composition and contribute to nutrient cycling.

Human interactions and management

Hornets attract attention because nests near homes can present safety concerns. Many jurisdictions recommend avoiding DIY nest removal and suggest consulting local pest control or conservation authorities. Some species have become invasive outside their native ranges and can affect beekeeping, native insects and human activities; monitoring and targeted management are used where populations threaten health or biodiversity. General information on social wasp ecology and safe response to nests is available from local wildlife and pest agencies.

Further reading and resources: For taxonomic details consult entomological guides to Vespa and regional faunas of Europe, Asia and Africa. Overviews of New World vespines and introductions appear in resources covering the Americas, while habitat and conservation issues are discussed in literature on forests and dry-climate ecosystems.