This honking big moth is found in eastern North America, from Florida to Maine in the U.S., and from Saskatchewan eastward through central Quebec to Nova Scotia in Canada. It is also found across Mexico; it is considered threatened there, due to habitat loss.

The moth has lime-green wings and a white body. Its typical wingspan is roughly 114 mm (4.5″), but wingspans can exceed 178 mm (7″), ranking the species as one of the larger moths in North America. I’d love to see one in the wild!