Subject: blue horned caterpillar
Location: Glenwood Springs Colorado
August 18, 2015 10:25 am
found this in the parking lot in glenwood springs colorado when my dog sniffed it and reared back then i noticed that it had a horn and was wondering if it was poisonous
We have determined that your caterpillar is a Great Ash Sphinx Caterpillar, Sphinx chersis, based on the images and description on BugGuide which states: “Larva – greenish or pinkish with seven long diagonal lines sometimes edged with pink. Spiracles elongate, black ringed with white. Horn blue or pink.” While doing our research, we encountered this blog posting and we have written in with an identification.