Invertebrates

Monarch Butterfly Migration and Conservation

Monarch butterflies undertake one of the most remarkable migrations in the animal kingdom, but face mounting threats from habitat loss and climate change.

Key Facts

Monarchs travel up to 4,500 km from Canada to Mexico each autumn
A single butterfly can fly up to 80 km per day during migration
Eastern monarch populations have declined by over 80% since the 1990s
Milkweed is the sole larval food plant for monarch caterpillars
Oyamel fir forests in Mexico shelter up to a billion overwintering monarchs

Welfare Considerations

Monarch butterflies face welfare challenges at every stage of their life cycle. Pesticide-contaminated milkweed can poison larvae before they develop. Loss of nectar corridors leaves migrating adults exhausted and starved. Climate-driven storms devastate overwintering colonies. Road mortality during migration is substantial along major corridors.

What You Can Do

Plant native milkweed species in your garden or balcony
Create nectar corridors with late-blooming wildflowers
Avoid pesticides especially neonicotinoids near milkweed
Support Journey North monarch monitoring program
Advocate for protection of overwintering forest reserves in Mexico