Maine residents typically view monarch butterflies from July to September during the summer migration season. However, monarch sightings are becoming much less common across the state. This is likely due to a reduced amount of the milkweed plant that acts as a reproductive host and primary food source along their migration route. Challenges relating to decreased overwintering habitat are also contributing to a population decline. Read more about monarch butterflies.
Since 2007, volunteers have been participating in the Maine Butterfly Survey, a citizen science project that seeks to identify butterfly populations in Maine. The last field season for the Survey project will be next year, but volunteers are encouraged to continue monitoring monarchs through the Signs of the Seasons program, which is ongoing.