I also found out that the Banded Woolly Bear can travel up to a mile a day looking for a protected place to spend the winter and that they like to burrow under piles of leaves. It turns out that a Woolly Bear needs the cold to complete its metamorphosis; that is, they almost freeze solid and when spring arrives they thaw out, eat some greens, and then spin a cocoon (that looks a bit like a cat hairball), before transforming into its adult form as a Tiger Moth. The Tiger Moth has only one task to complete in its two-week life: find a mate and lay eggs. They do not even have mouth parts, so need waste no time looking for food.
Infinite Spider explains: "For a long time scientists weren't sure if the woolly bear caterpillar used a strategy of diapause (insect equivalent of hibernation) or quiescence to survive winter. Scientists from the University of Pennsylvania did some studies of different caterpillars collected in fall and winter and then compared their development and metabolic rates. They found that the woolly bear caterpillar goes into quiescence, hiding under leaf litter and literally going dormant until conditions change. They could wake easily if it got nice outside, unlike their diapausing cousins."
Xerces Society has created a slew of cute #LEAVETHELEAVES graphics to encourage folks to enjoy the benefits of leaf litter. Cheers for mulch and overwintering sites for our insect friends!