Io Moth Caterpillar

We have an unexpected visitor in our garden these days:

I am pretty sure this is an Io Moth caterpillar...and yes they sting.
After looking up the Io Moth online, I am pretty sure I saw a momma moth under our porch light a while back. I noticed two like this, but only one has stayed put long enough for me to get good picture of it. I'm not planning to put it in the butterfly cage. Their metamorphosis is more dependent on other things (leaves, dirt) and I'm not eager to kill it with kindness.

So not a butterfly, but I'll class it with those posts for now :)