The woolly bear caterpillar is the larval stage of the Isabella tiger moth, Pyrrharctia Isabella. The Isabella tiger moth overwinters in the larval stage. In the fall, caterpillars seek shelter under leaf litter or other protected places. They eat mostly weeds, including dandelion, clover, and grasses. Woolly bears are relative speedsters in the caterpillar world, crawling at a neck-snapping .05 miles an hour, or about a mile a day.
The woolly bear caterpillar — with its distinct segments of black and reddish-brown — has the reputation of being able to forecast the coming winter weather. According to legend, the wider that middle brown section is, the milder the coming winter will be. Conversely, a narrow brown band is said to predict a colder, snowier winter. Among a group of woolly bears, the stripes can vary greatly, making their forecast difficult to confirm; the same group of eggs can even hatch into caterpillars of varying dark and light bands. » Continue Reading.