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Invasive Worm Species #872123

Asked June 07, 2024, 4:53 PM EDT

I’ve never seen this type of worm until last summer. They are back this spring. They are mostly flat like and yellow in color. I have attached a picture. Let me know if they are dangerous to people, pets, or the environment in KY.

Jessamine County Kentucky

Expert Response

Based on your picture, it appears to be a 
wandering broadhead planarian. It is considered an invasive and is known to prey on earthworms. It is found in gardens and woodlands under objects like leaf litter, where the soil is moist. You can read more about it in this article by Penn State Extension:
https://extension.psu.edu/hammerhead-flatworms-and-other-land-planaria-of-eastern-north-america

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