What's That Bug? does not endorse extermination

Subject: caterpiller? with white filaments on Black walnut
Location: SE Pennsylvania
September 7, 2015 4:52 am
Hi
Found these bugs on black walnut leaves, some of which were nibbled on.They looked like feathers from a distance.
Located in SE Pennsylvania, temps warm and humid, no rain recentlyf
Signature: Carol Huff

Butternut Woolly Worm

Butternut Woolly Worm

Dear Carol,
Even though they are feeding on black walnut leaves, the common name for your Sawfly Larvae is Butternut Woolly Worm,
Eriocampa juglandis.  Sawflies are non-stinging relatives of bees and wasps.  According to BugGuide:  “larvae peculiar, covered with long threads of wax.”

Butternut Woolly Worm

Butternut Woolly Worm

Thanks! Peculiar little buggers!
Ta
Carol

What's That Bug? does not endorse extermination
Location: Pennsylvania

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