Looking as if it’s dressed to go out to a festive event with those striking colors, this is a caterpillar of the Brown-hooded Owlet (Cucullia convexipennis).
At this stag in its life it eats Asters and Goldenrods, and I’ve captured this one eating away on a Goldenrod.
As an adult it will become a very drab brown moth which eats nectar, fruits, sap, and whatever other sweet fluids it can find.
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