All hail the woolly worm, harbinger of winter.
The annual migration of the wooly worm caterpillar has begun, a sure sign that autumn is upon us.
Also known as Pyrrharctia Isabella or a woolly bear, the larvae emerge from the earth in the colder months -- brown and black hair cover the bodies.
According to folklore, the woolly worm is believed to have the ability to forecast the weather for the coming winter season.
Its body has 13 segments, the legend is told, each corresponding to a week in winter.
If a segment is light brown, that means the week will be mild. If the segment is black, that means a harsh and cold week.