We are starting to see the most impressive wasp found in Ohio. Eastern cicada killers (Specius speciosus) are large, solitary wasps. The cicada killer is one of the largest wasps in North America.

Because of this, some folks will try to attract cicada killer wasps to their yards. These large wasps sting cicadas and then move them into their underground tunnel system to feed their young.

When Brood XIX emerges in Tennessee mid-May, they'll face a unique, venomous predator — killer cicada wasps. The wasps, which can be found in the eastern and western United States, prey on ...

Also harmless to humans (but perhaps more frightening!) are cicada killer wasps, which at 2 inches are among the largest wasps in existence. “They're basically harmless to humans,” Bertone said.