The Menelaus Blue Morpho (Morpho menelaus) is an iridescent tropical butterfly of Central and South America. It has a wing span of 15 cm (5.9 in). The adult drinks juice from rotten fruit with its long proboscis, which is like a sucking tube. The adult males have brighter colours than the females. The larvae eat plants at night. Known larval foodplants are Erythroxylum pulchrum and Machaerium. The larvae are red-brown in colour with bright patches of lime-green or yellow.