Venomous Caterpillars Invade Michigan, Pose Threat to Pets

Michigan residents are being warned about three venomous caterpillar species that are invading yards and trees every fall. These caterpillars, known as the American Dagger Caterpillar, Hickory Tussock Moth Caterpillar, and Spongy Moth Caterpillar, pose a significant threat to pets due to their toxic venom.

The American Dagger Caterpillar is characterized by its yellow and white color with black hairs. It grows up to 2 inches long and can be found on the ground and in various types of trees between July and October. The caterpillars' venom can cause a stinging sensation followed by a burning, itching sensation on the skin, which may develop into a rash.

The Hickory Tussock Moth Caterpillar is relatively harmless to humans but can cause a rash if ingested or if an individual has an allergy. It is most common along the East Coast states from Maine to the Carolinas and peaks in July-September each year.

The Spongy Moth Caterpillar, on the other hand, is an invasive species that can cause a rash and stinging sensation upon contact with skin. Michigan residents are advised to keep their pets away from these caterpillars to avoid any adverse reactions.