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Photo#693722
Question mark caterpillars? - Polygonia interrogationis

Question mark caterpillars? - Polygonia interrogationis
Burlington, Alamance County, North Carolina, USA
August 22, 2012
These caterpillars were fairly gregarious, in groups of 3 or 4, on the undersides of elm leaves. Beautiful caterpillars, I'd never seen anything like them. Maybe Polygonia interrogationis? Also, are the different color patterns different instars, or just variation among individuals? Thanks!

Moved
Moved from Butterflies and Moths.

Based on ID of the host tree as elm and the appearance of the caterpillars compared with images in the guide.

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Moved from ID Request.

Elm leaves
With the venation and serration I would lean more toward those leaves being elm.

 
Agree with elm

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