Monarch Arc

04/25/2026

04/25/2026

Since 2019, implementation of the Western Monarch Butterfly Conservation Plan -2019-2069 revealed structural and organizational aspects that needed improvement. In response, the Western Monarch and Native Insect Pollinator Work Group (WMNIP) specifically dedicated time and attention to address these...

11/19/2025

Scientists are always attempting to lure the Monarch Butterfly mysteries to reveal their secrets.

We are hopeful this will be an exciting learning opportunity, opening new doors of scientific data and facts, for the benefit of our ecosystem, the habitats it provides, and migrating Monarchs pollinating our food over many miles too.

For the first time, scientists are tracking the migration of monarch butterflies across much of North America, actively monitoring individual insects on journeys. It could provide crucial insights into the life cycles of hundreds of flying insects at a time when many are in steep decline. https://nyti.ms/3LOARsE

11/01/2025

Monarch Arc is grateful Xerces took a step back from their hypothesized stance to include the science and current data for a more inclusive look at the Monarch Butterfly’s Western Migration Population, California specifically.

We hope Master Gardeners Ventura County will help educate the Ventura County powers that be for a reversal; toward re-legalizing Asclepias curassavica sales within the county.

06/05/2025

Asclepias curassavica, (Tropical Milkweed,) got a science-based bath and isn’t the “dirty, little, black sheep” sitting in the corner anymore! 🦋🐛🌱

Monarch butterflies are famous for their annual migrations, but not all migrate. In recent years, more and more monarchs have been living and breeding year-round in California’s Bay Area, thanks in part to the growing presence of non-native milkweeds in urban gardens.