Looks like a butterfly cat. What plant is it eating?

I think it's a giant leopard moth caterpillar. I made this picture of one several years ago all curled up, apparently right after a rain -

Here's a picture of the adult moth -

Sherry

The caterpillar is on my swamp milkweed Jay. I wish I knew how to raise it and see it develop.

Sherry, it sure looks like the giant leopard moth caterpillar. The moths are really pretty.

I looked at a list of recorded host plants for the leopard moth and milkweed wasn't on it. Tussock moth cats eat milkweeds. Why don't you look at some pictures of tussock moth cats and compare them with your cat. I trust Miss Sherry's i.d.s, but the photo isn't the best, it would be better to view the whole cat from the top.

Jay, the Tussock that I googled has a more hairy (fuzzy) body. The one on my MW has a smooth body more like the Giant leopard Sherry posted. Maybe later it would change but now still be in it's early stage. Will look into it further, just interesting to check out what is flying around in the garden, but not getting too fanatic about it. Thank you so very much for the reference.

The pic they uploaded for me here is not really as sharp as mine.