Over the weekend, people in Lewisburg, Pa., gathered for a weather forecast from caterpillars. Woolly Bear caterpillars are black, with a brown stripe down the middle. Folklore says the larger the stripe, the milder the winter.
“Are the woolly worm’s bands really an accurate way to predict the winter weather? Dr. C.H. Curran, former curator of insects at the American Museum of Natural History in New York City, tested the woolly worms’ accuracy in the 1950’s. His surveys found an 80% accuracy rate for the woolly worms’ weather predictions.” About.com