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Horntails, Wood Wasps and SawfliesNeed to know what this is
Photo taken in woods in northern Indiana. August 27, 2008 One inch or a little smaller in length. About ten on one plant. Don’t know what the plant is. Thanks Much,
John Hicks
Hi John,
Though it resembles a caterpillar, this is actually a Sawfly Larva known as a Butternut Woolly Worm, Eriocampa juglandis. According to BugGuide, they: “feed on leaves of Black Walnut (Juglans nigra) and Butternut (Juglans cinerea). Also reported on Carya spp. (Hickory).”
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