About Eryphanis polyxena (Meerburgh, 1775)
Eryphanis automedon reaches a wingspan of about 55–60 millimetres (2.2–2.4 in). On the dorsal wing surfaces of males, iridescent night blue patches stretch from the submedial to postmedial areas, with sharp, well-defined borders separating these patches from non-iridescent sections. Ventral wing surfaces range in color from faded brown to caramel, and bear various eyespots. Females have a slightly larger wingspan and a slightly different wing color pattern. This is a fast-flying butterfly that can live up to six weeks, and it flies in the dark forests of Latin America. Its caterpillars are cryptically colored and feed at night on Poaceae host plants, primarily bamboo leaves. The species' elongated chrysalis mimics the appearance of a dried leaf. This butterfly is native to South America, where it is present from Venezuela to the Guianas and Brazil, and from Colombia to Paraguay, at elevations from 0 to 1,000 metres (0–3,281 ft) above sea level.
