Garden Pests and Diseases: Ctaerpillar ID, 1 by Gitagal

Gitagal wrote:
Can someone tell me what kind of a Caterpillar this is--
and what will it morph into? A moth? A Butterfly? A nasty bug?

It has long, yellow fuzz and 3 long spikes--two behind its hear-and one,
sticking straight up, by its tail.
The head is black and looked like it had two bumps on it--eyes maybe?
Not too visible...it kept moving its head.
It was crawling along the very base of my house siding--maybe looking for
an opening to enter (pupate?).
As it was crawling along--it was moving its head side to side--sensing.smelling?

Thanks, Gita