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Western Monarch Milkweed Mapper

Western monarchs overwintering in California 2021-2022 (Photo: Jessica Griffiths)
New Year’s Count of Western Monarchs Tracks Population Decline During Overwintering Season
Volunteers count monarchs in Pacific Grove Monarch Butterfly Sanctuary, December 2021 (Photo: Candy Sarikonda)
Western Monarch Thanksgiving Count tallies nearly 250,000 butterflies
Monarchs at a private overwintering site in Monterey county, CA
Monarchs at the Pacific Grove Butterfly Sanctuary in Pacific Grove, CA
The Bounciness of Butterflies
A handful of monarch butterflies with wings closed rest on the long gray-green leaves of eucalyptus
Monarch Population in California Spirals to Another Record Low
A monarch with large pieces missing from both wings perches on an evergreen branch.
New Year’s Count Finds Continued Decline of Monarchs Overwintering in California
A monarch clings to the trunk of a tree in a dimly-lit landscape.
Thanksgiving Count Shows Western Monarchs Need Our Help More than Ever
In this close-up photo, a monarch perches atop a cluster of small, white and pink flowers. The image is so detailed, you can see the eye of the monarch, and the scales on its wings.
Monarch and Pollinator Habitat Kits Designed to Support Imperiled Western Monarchs
Two monarchs' wings overlap as they stand back end to back end, mating.
Community Science Powers New Western Monarch Studies
A beautiful, bright orange monarch perches atop bright pink milkweed blossoms.
Working to Conserve Monarchs from Coast to Coast
A tiny monarch egg can be seen in a cluster of pink milkweed blossoms.
New iNaturalist Project Makes it Easier to Submit Data to the Western Monarch Milkweed Mapper
Monarch butterfly flying above milkweed.
Community Scientists Can Help Support Imperiled Western Monarchs
A monarch clings to the trunk of a tree in a dimly-lit landscape.
Record Low Number of Overwintering Monarch Butterflies in California—They Need Your Help!
A monarch, with its wings folded, showing the duller orange side, clings to a rough tree trunk in a dimly-lit landscape.
Early Thanksgiving Counts Show a Critically Low Monarch Population in California
A bright orange monarch with a torn wing perches on some pink milkweed blossoms in a grassy, dry landscape.
Western Monarch Numbers Expected to Be Low this Year