LadyKate wrote:
Ladas: The Orange Striped oak worm has a black-based body with spikes or horns....these caterpillars have none and are smooth.
They were also found all over the sidewalk and the grass and nowhere near a tree.
Puzzling.....I wish I had a camera that would do close-ups. I really think a better photo would make the identification process easier.
Hard to tell, since I found a lot of reference photographs of the Orange striped, and some were black with distinct orange stripes, some were green. That said, it might not be that particular species, but I think its still in the Anisota group based upon the general description and character of the caterpillar.
Also, this time of year, these caterpillars are pretty common, and start dropping to the ground and looking for places to burrow into the ground, where they will spend the winter months in pupae form. Its not surprising you found them on the ground rather than in the trees.
But yeah, a better photo would be easier. I'm working from a mental image of similiar caterpillars we have here based upon your photo, but the ones I'm thinking of aren't green... but your pictures look all brown.