This is quite a varied and interesting group of insects. Some species are just a fraction of an inch while others can be over an inch and half long. Although they live by themselves, some nest close to each other in nonsocial groups. Many sphecid wasps nest in the ground. Others nest above ground in cavities, such as in twigs or crevices, or in nests constructed of mud.

Sphecid wasps prey on other insects and spiders. They paralyze insects to feed to their young. They either drag the immobilized insects back to their nests or carry them while flying back. A particular sphecid wasp species usually attacks a specific type of insect.

Although sphecid wasps can sting, they are generally not aggressive towards people and mind their own business if they are left undisturbed. If their nests do not pose any threat, then leave them alone and they will go away on their own by the end of the summer. If there is concern about stings from a ground nest, pour soapy water into it. Use a ‘wasp and hornet' spray if there is a troublesome above ground nest.