Southern Flannel Moth Animal Pictures Megalopyge opercularis© Brett Hondow/Shutterstock.comAdvertisement WATCH: Sharks biting alligators, the most epic lion battles, and MUCH more.Enter your email in the box below to get the most mind-blowing animal stories and videos delivered directly to your inbox every day. Thanks for subscribing! © Brett Hondow/Shutterstock.com View Original ImageView Southern Flannel Moth Article © Patrick Coin (Patrick Coin), CC BY-SA 2.5 — License (Original) View Original ImageView Southern Flannel Moth Article © Brett Hondow/Shutterstock.com View Original ImageView Southern Flannel Moth Article © IrinaK/Shutterstock.com View Original ImageView Southern Flannel Moth ArticleCaterpillar of the southern flannel moth (Megalopyge opercularis). Venomous spines under the hairs can produce a very painful sting. Most dangerous caterpillar in the United States. Isolated on white background © iStock.com/irin717 View Original ImageView Southern Flannel Moth Article