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About
A medium-sized moth whose caterpillar is famous for its extremely long development. Adults are gray-brown with hairy bodies. The densely hairy caterpillar is dark brown to black and curls into a tight ball when disturbed.
Did You Know?
The caterpillar can take up to 14 years to complete development, spending most of each year frozen solid and thawing for only a few weeks of feeding each summer.