Yellow Bear (Spilosoma virginica) caterpillars are active in the fall. It’s that time of year again. A sure sign of fall is the appearance of woolly bear caterpillars. I was taking a walk around the Courtenay Airpark Lagoon and came across a Yellow Bear crossing the path. The Yellow Bear is the caterpillar of the Virginian Tiger Moth (Spilosoma virginica). …