Adult Monarch butterfly is a milkweed adult butterfly, in the family of Nymphalidae butterfly. It may be the best known of all North American adult butterflies. And it has been found in New Zealand, and in Australia this adult butterfly has been called as the Wanderer. In Europe the adult butterfly is resident in the Canary Islands, and has been found as an occasional migrant in Western Europe. This adult butterfly's wings feature an easily recognizable orange and black pattern, with a wingspan of 8.9 until 10.2 centimeters. The Viceroy adult butterfly has a similar size, color, and pattern, but can be distinguished by an extra black stripe across the hind of its wing. Adult butterfly Female Monarchs have darker veins on their wings, and the males of adult butterfly have a spot and it is called by the "Androconium" in the center of each hind of wing from which pheromones are released. And those males are also slightly larger.