Western Monarch Milkweed Mapper

The Western Monarch Milkweed Mapper is a community science effort to map monarchs and milkweed across the Western United States. To preserve and protect populations in western states, we need to better understand where and when monarchs and their milkweed host plants occur in the landscape. Data compiled through this project will improve our understanding of the distribution and phenology of monarchs and milkweeds, identify important breeding areas, and help inform monarch conservation needs.

Your help is critical to the success of this project! You can participate in this effort by uploading your photos of monarchs (all life stages) and milkweeds to our website *OR* iNaturalist Project. Have fun while learning more about monarchs and the special habitats they use in your area!

The Western Monarch Milkweed Mapper is a collaborative partnership between The Xerces Society, Idaho Department of Fish and Game, Washington Department of Fish and Wildlife, National Fish and Wildlife Foundation, and US Fish and Wildlife Service.