We are excited to try keeping it to watch it's phases and turn into an Isabella Tiger Moth (if it's the same as the one on the site where we did our research.) We looked up some info on how to keep it alive here.
I didn't know the folklore that if the brown stripe in the middle is wider than the black ones, we will have a long winter ahead. This one seems to have survived our very mild winter just fine, and the brown stripe doesn't look too wide to me!
I also read that there are towns that have Wooly Bear festivals every year and race their caterpillars. The winning caterpillar is the one whose stripe predict the coming winter weather.
I hope this little guy makes it! We haven't had much luck in the past. Though we never tried keeping one in this nifty cage or researching its needs. If it does live, we plan to make an emergence cage to watch it a while before we let it go. (see site above)