Oak eating caterpillar
Hi there, I love your site. We recently found this guy munching on a scrub oak near Santa Fe, NM. We found several more on an oak tree in our back yard the next day. They all seem to have moved on or pupated by now but I would love to know what species they are.
Jeff Sherman

Hi Jeff,
This is a Spiny Oakworm, Anisota stigma. Our old Holland Book lists them west to Missouri, but the range might have expanded or the information at the time of publication may have been incorrect.

Correction:  January 14, 2014
Based on a new identification today, we now know that this is Oslar’s Oakworm,
Anisota oslari, a different species in the same genus.

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