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Photo#347338
This caterpillar was on a Red Bay tree in my yard in North Coastal South Carolina on 28 October 2009. It was late afternoon.  - Papilio palamedes

This caterpillar was on a Red Bay tree in my yard in North Coastal South Carolina on 28 October 2009. It was late afternoon. - Papilio palamedes
Conway, Horry County, South Carolina, USA
October 28, 2009
Size: approx. one inch

Moved
Moved from ID Request.

looks like Spicebush Swallowtail Caterpillar
to me, Papilio troilus, but better wait for a butterfly expert to be sure.
Welcome to Bugguide!


 
also check
Palamedes Swallowtail, I'm not quite sure of the differences but this one seems to explain. If I'm reading and looking correctly Spicebush looks better, but I don't know for sure.

 
based on that, I'd say Palamedes here
On the 1st abdominal segment (behind the "eyes" of the 3rd thoracic segment), the blue spots are slightly forward of the orange-brown patches. In the Spicebush, the blue spot is inside the patch - the photo Andy linked shows that well. The difference is very noticeable now that I'm looking at both species at the same time, but I'm sure I'll forget it by the next time I see one in the wild :-)

 
yup, i see it now too - you're right :-)
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