Monkey Slug

Cephalopod like Door Creature
Location:  Richmond, Virginia, USA
October 20, 2010 7:55 am
On October 18 at about 8 pm I found this creature attached to the outside of the glass on my back door. Although I never saw it move after a 2 hour period it had changed position from the bottom right to about the middle left of the door window. It is slightly bigger than a 5-cent nickel.
After taking the pictures I put it in a small votive glass with a piece of cardboard, secured with rubber bands, on top. That left a less than 1/8 inch gap on one side of the glass jar which is much less than the width of the creature. I placed it outside my garage door at 11 pm and went to bed. I checked on it at 8:30 am the next morning and it was still in the same position in the jar. Checking again 3 hours later and it was gone apparently having slid through the 1/8 inch gap. I have not seen it since.
Signature:  Bob from Richmond

Monkey Slug

Hi Bob,
This interesting creature is the caterpillar of the Hag Moth and is called a Monkey Slug.  It should be handled with caution as it is a stinging caterpillar.

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BugMan aka Daniel Marlos has been identifying bugs since 1999. is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

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