What's That Bug? does not endorse extermination

polyphemus caterpillar?
I think from your site that this might be a polyphemus caterpillar, but I couldn’t really tell because the pictures of them weren’t quite sharp enough. So here is my picture. The kids found it in the back yard on September 9 near a maple tree, I believe. We live in Portland, Or. Thanks!
Leah Parker

Hi Leah,
You are correct. This is a Polyphemus Moth Caterpillar. Here is BugGuide’s description of the caterpillar: “Larva: body large, bright green, with red and silvery spots below setae, and oblique yellow lines running through spiracles on abdomen; diagonal streak of black and silver on ninth abdominal segment; head and true legs brown; base of primary setae red, subdorsal and lateral setae have silver shading below; end of prolegs with yellow ring, and tipped in black.” Most of the identifying features cannot be viewed from your camera angle. A lateral view is best. While the Polyphemus Moth Caterpillar might be confused with the Luna Moth Caterpillar in the east, there is nothing similar looking in the western U.S.

What's That Bug? does not endorse extermination

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