That is a White Marked Tussock Moth.
The long, spiky tufts of hairs give fair warning to anyone or anything that tries to touch this species' larva. The caterpillar is covered with them and the chemicals that are transferred onto skin when touched can cause an allergic reaction in humans resulting in redness, irritation and welts.
It also has four ...
This is a tussock moth caterpillar in the Lymantriidae family.
The image is not clear enough for a definitive ID, but it appears you have some species in the genus Orgyia.
Likely, this is a white-marked tussock moth caterpillar (Orgyia leucostigma).
From Auburn University:
The full-grown larva (Photo 2) is around 35 mm long. The head and shield on ...
Speculation based off general knowledge here but that looks to be a common gray moth. Based off some information I've pieced together, mating is usually spring to early summer. This leads me to believe the display you are seeing is for mating. These moths are found through out the nation but heavily concentrated in Ohio and Michigan.