Monarch Migration 2024 Map Washington State. We have created a comprehensive map representing both the fall and spring migrations both east and west of the rocky mountains. Monarchs require secure patches of milkweed and nectar resources during breeding, roosting sites and safe travel corridors for.
Washington will soon host monarch butterflies, but their population is dwindling. As millions of monarch butterflies make their way down the east coast to mexico for the winter, butterfly scientists want people in their flight path to report.