Certainly Pyrrharctia isabella caterpillars deserve a lot of respect because of their rugged life. They are found as far north as Alaska, and seem to enjoy the cold. They come equipped with the stamina and chemistry necessary to survive winter weather like Garrison Keeler's old bachelor Norwegian farmers.
"(The woolly bear) literally freezes solid. First its heart stops beating, then its gut freezes, then its blood, followed by the rest of the body. It survives being frozen by producing a cryoprotectant in its tissues." WikipediaTo prepare for winter the caterpillar has to eat a lot. It does this over several months in Missouri where the growing season is long. In Alaska where the season is short, it may have to last through several winters, emerging from its frozen state to put on "a few more pounds" before the next prolonged freeze. They have been known to survive up to 14 winters!
Pity the poor Isabella tiger moth that will emerge from the woolly bear caterpillar's future cocoon next spring. Indeed, the Wikipedia article on P. isabella doesn't mention the moth beyond a picture. The specimen above is a female with the typical red-orange hind wing. The moth has a lot of work ahead of it, first finding a mate and then delivering its eggs, all over its short adult life span. The egg has to be placed on the appropriate host plants such as asters, birches, clover, corn, elms, maples, and sunflowers.
The pictures above were taken by an excellent amateur nature photographer, Bob Moul. He submitted many images to Bugguide.net and BAMONA, an example of the contributions of citizen scientists to our natural history. He passed away in 2011.