Wild Monarch Butterfly Welfare and Migration

Monarch butterfly populations have declined dramatically, raising questions about insect welfare during their extraordinary migratory journey.

Key Facts

Eastern monarch populations declined approximately 80% between 1996 and 2014
Milkweed loss from herbicide use in agricultural areas eliminated the primary larval food source
Overwintering forests in Mexico have been reduced by illegal logging and climate change
Western monarchs overwinter along the California coast with populations below 30,000 in recent winters
Monarchs navigate using a time-compensated sun compass requiring circadian rhythms
Climate change alters the timing of milkweed availability and migration phenology
Voluntary milkweed restoration programs have helped increase habitat availability

Welfare Considerations

Insect welfare is an emerging area with scientific uncertainty about the capacity of butterflies for suffering. However, the dramatic loss of a species whose life involves complex developmental transformations and extraordinary migrations warrants concern. Population collapse eliminates the ecological relationships that monarch migrations have shaped over millennia. The welfare of insect pollinators is increasingly included in animal welfare frameworks given evidence of basic nociception in insects.

What You Can Do

Plant native milkweed species appropriate to your region to support monarch larvae
Create or advocate for pollinator gardens in your community with native flowering plants
Avoid pesticide use in your garden especially during peak monarch butterfly season
Support organizations working on monarch habitat restoration and conservation
Advocate for agricultural pesticide policies that protect milkweed in farming landscapes
Participate in citizen science monarch monitoring programs like Journey North