Less than 1 inch long, crawling on cement driveway, Chalmette, LA
Your caterpillar is in the genus Automeris. Since the caterpillars look a little different at different stages of development and several look similar in the early instars or stages, it is hard to know which one you have from the one angle of the photo. A side picture would be better.
In common terms, this caterpillar is an Io moth caterpillar or a relative. The moth is one of the silkmoths.
The caterpillars of this genus feed on a wide range of plants and trees including birch, oak, willows, maples, elms, cotton, roses, clover and grasses.
When little these caterpillars stay together, but then spread out as they get larger. After feeding they form a papery cocoon in leaf liter.
In the south you may get up to 4 generations a year.
CAUTION – These larva may “sting” if handled.