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Cloudless Sulphur Caterpillar

Posted by March 8th, 2008 at 1:00 am

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butterfly caterpillars

what is this caterpillar?
Hi Bugman,
I found this caterpillar in Santa Barbara, California. I found it interesting that it matched the color of the plant I found it on. I have looked around a bit on the web to identify it without any luck. Can you help? Also, any idea which plant it is eating? Thank you!!
Dan Sullivan

senna sulphur cat dan Cloudless Sulphur Caterpillar

Hi Dan,
This is a Cloudless Sulphur Caterpillar, Phoebis sennae, also called the Senna Sulphur. The butterfly is a large, clear yellow, fast flying species. The plant is Senna. As a means of camouflage, the caterpillars are often green when feeding on the leaves, and yellow when feeding on the blossoms.

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