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Fat caterpillar - Coloradia doris

Fat caterpillar - Coloradia doris
Bryce Canyon National Park, Utah, USA
September 8, 2010
Probably about 3 inches long, maybe a bit more. Was crossing a trail. Never seen one like it before or since.

Moved from ID Request.

Definitely Coloradia
As for the species, I'd also say C. doris, I believe C. pandora davisi is within range, but this larva more closely resembles the larvae of C. doris.

This is the first larval C. doris image for the guide.

I'm very pleased to have contributed a new species.

Likely genus Coloradia or perhaps Hemileuca
I don't have anything handy now to double check the species. Coloradia larvae feed on pines, and get very large. Perhaps this is C. doris?

You're probably right
...but how to differentiate between those two genera? The Coloradia caterpillars on BugGuide-now that you've directed me to them-seem too shiny for this individual, making me lean towards Hemileuca, but shininess is a fairly useless taxonomic indicator.

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