Monarch Butterfly Tagging

In September 2025, Friends of Cardinal Valley joined the annual monarch butterfly migration by tagging monarchs along the ponds at Cardinal Valley. These butterflies discovered the swamp milkweed we planted last year, and we were thrilled to see them laying eggs, feeding on pollen, and even mating in our restored habitat. We also found caterpillars thriving among the milkweed, proof that our plantings are supporting the next generation.

Why we tag monarchs:
Tagging monarchs helps scientists track their migration from North America to overwintering sites in Mexico. By recording where butterflies travel and how far they go, researchers can learn more about survival rates, migration timing, and the health of their populations. This information is vital for conservation efforts, especially as monarch numbers have declined dramatically in recent decades.

Why monarchs matter:
Monarchs are not only beautiful and iconic pollinators, but they also play an important role in our ecosystems. They help pollinate milkweed and other native plants, supporting healthy habitats for countless insects, birds, and other wildlife. Their presence signals a thriving local ecosystem.

How you can help:

• Plant native milkweed and nectar flowers to provide food and breeding habitat.

• Avoid using pesticides that can harm butterflies and other pollinators.

• Participate in local tagging, monitoring, or citizen science programs.

• Support conservation groups that protect habitats along migration routes.

By planting, protecting, and learning about monarchs, we can all contribute to the survival of this remarkable species and the pollinator networks that sustain our local ecosystems.

Learn more about tagging and monarch conservation: Monarch Watch