Wasps are any animal in order Hymenoptera and suborder Apocrita that is neither a bee nor ant. There are over 200,000 species, making wasps one of the most diverse groups of insects. The most familiar types are the common wasp (Vespula vulgaris), yellowjackets (members of genera Vespula and Dolichovespula), and the European hornet (Vespa crabro).

Like all other insects, wasps are invertebrate arthropods that reproduce using a larval stage. They have two pairs of wings used for flight. Females have a stinger, which evolved from a female sex organ called an ovipositor, thus being absent in males. Most wasp stings are painful and unpleasant and like a match head that flips off and burns on your skin. A few rare species, like the Asian giant hornet, can produce stings so toxic that they can kill. Unlike bees, wasps lack barbs on their stingers, meaning they can sting repeatedly.