The Viceroy Butterfly (Limenitis archippus) is a North American butterfly that is found in most of the contiguous United States, and in parts of Canada and Mexico. The wings have an orange and black pattern, and the Viceroy Butterfly is distinguished by the Monarch Butterfly by its smaller size and the postmedian black line that runs across the veins on the hindwing. There have been observations of different color forms in different regions of their territories. Adults will eat nectar on milkweeds, thistles, and other common flowers, and their main predators are mostly birds.