Elizabeth Moody is pictured at Bay Boat Club with the Monarch Waystation registration. As the fall migration of monarch butterflies comes to a close you may have heard that monarch butterflies have been placed on the endangered species list by the International Union for Conservation of Nature (IUCN). The Union has placed it on their Red List of Threatened Species as they found the population of the monarchs east of the Rockies shrunk by 84% between 1996 and 2014 and continues to decline.