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Western Monarch Milkweed Mapper

Community Science Powers New Western Monarch Studies

Western monarch researchers and community scientists have been busy, contributing information vital to understanding the situation facing this imperiled population.

Working to Conserve Monarchs from Coast to Coast

The Xerces Society is working across the U.S. to conserve this beloved species, and there are a number of ways you can help!

New iNaturalist Project Makes it Easier to Submit Data to the Western Monarch Milkweed Mapper

We need all hands on deck this season, to better understand the hurdles facing the imperiled western monarch population!

Community Scientists Can Help Support Imperiled Western Monarchs

While hiking in California and the rest of the West, you can help researchers by submitting any and all monarch and milkweed observations this year to the Western Monarch Milkweed Mapper website.

Record Low Number of Overwintering Monarch Butterflies in California—They Need Your Help!

We urge you to join us and our colleagues in the western monarch science and conservation community in taking meaningful, swift action to help save western monarchs.

Early Thanksgiving Counts Show a Critically Low Monarch Population in California

The California overwintering population has been reduced to less than 0.5% of its historical size, and has declined by 86% compared to 2017.

Western Monarch Numbers Expected to Be Low this Year

What can you do to help the monarch? Protect habitat, avoid pesticide use, plant gardens, and contribute data to Xerces-led community science efforts.