The moth family Geometridae has a number of brilliant little bright green moths in it, not even all in the same genus. To make things weirder, the cypress emerald moth (Nemoria elfa) also comes in a red or brownish flavor, which appears to be seasonal to cooler weather.
Adults are approximately 9-12mm across, with females being slightly larger. They live in the eastern United States (roughly), and west to Texas, and, as you may expect, the larvae preferentially eat bald cypress (Taxodium distichum).
Cypress emerald moth (Nemoria elfa)
He/she has tucked that foreleg rather saucily to one side. She/he is so done with my photo session.