Venomous Caterpillars Invade Michigan, Pets at Risk

Michigan residents are advised to be on the lookout for three venomous caterpillar species that are invading the state this fall. The American Dagger Caterpillar, Hickory Tussock Moth Caterpillar, and Spongy Moth Caterpillar can cause irritation and a stinging sensation if they come into contact with human skin.

The American Dagger Caterpillar is mostly yellow and white with black hairs, growing up to 2 inches long. It can be found on the ground and in various types of trees between July and October.

On the other hand, the Hickory Tussock Moth caterpillars are relatively harmless, but some people may experience a rash if they get stung. They peak from July to September each year, according to MSU.

The Spongy Moth Caterpillar is an invasive species that can cause a rash and a stinging sensation if it comes into contact with skin. Michigan residents are advised to keep their pets away from these caterpillars, as they are toxic to dogs and cats.