Monarch butterflies are the only butterfly species that migrate from the northern regions of North America during the winter months. From the United States Department of Agriculture (USDA) comes this informative website and citizen science project dedicated to "the unique and amazing phenomenon" of monarch butterfly migration. Here, visitors can learn about the migration routes of monarch butterflies via maps and a link to a video from the Encyclopedia of Life. Visitors can also check out a link to an interactive map from Annenberg Media that charts the sightings of eggs, larva, and adult monarchs throughout the year. One can access this map by clicking on the Report Your Sightings link on this webpage. Here, visitors are encouraged to submit their own sightings of monarch butterflies in order to help map the route of migrations. Anyone can learn about recent sightings by clicking on each pin on this map, which are color coded to denote the month of the siting. In this way, visitors can observe monarch butterfly migration from the northern United States south to Mexico.