Most wasps are carnivorous, feeding on insects, grubs, or spiders.
They have biting mouthparts, and the females have stings with which they paralyze their prey. The sting can be used repeatedly. Some wasps are solid black or dark blue, but most have red, orange, or yellow wings or markings. Stripes are common. Social wasps build nests of a coarse, papery material, prepared by masticating wood fiber.