The Madagascan Sunset Moth is a day-flying moth considered to be one of the most impressive and appealing-looking lepidopterans. Famous worldwide, it is featured in most coffee table books on butterflies and moths and is much sought after by collectors. Although very colorful, the iridescent parts of the wings do not have pigment; rather the colors originate from optical interference. Adults have a wingspan of 3–3.5 inches. Dru Drury, who described the moth in 1773, placed it in the genus Papilio, considering it a butterfly. Jacob Hübner placed it in the moth genus Chrysiridia in 1823. At first the Sunset Moth was believed to be from China or Bengal but was later found to be native to Madagascar. It is found in most parts of the island, with peak populations between March and August, and smallest numbers between October and December.