Michigan Residents Warned About Venomous Caterpillars Invading Yards This Fall

Michigan residents are advised to be on the lookout for three venomous caterpillar species that appear every fall. The American Dagger Caterpillar, Hickory Tussock Moth Caterpillar, and Spongy Moth Caterpillar can cause extreme irritation in humans, but are especially toxic to pets.

The American Dagger Caterpillar is yellow and white with black hairs, growing up to 2 inches long and found on the ground and in trees between July and October. It causes a stinging sensation followed by a burning, itching sensation that can develop into a rash.

The Hickory Tussock Moth Caterpillar is relatively harmless but can cause a rash if you get stung. It's most common along the East Coast states from Maine to the Carolinas, peaking in July to September each year.

The Spongy Moth Caterpillar is invasive and can cause a rash and stinging sensation upon contact with skin.