Wildlife

Wild Migratory Monarch Butterfly Neonicotinoids

Neonicotinoid pesticides reduce monarch butterfly populations by eliminating milkweed and reducing adult butterfly nutrition and survival.

Key Facts

Milkweed is the only host plant for monarch caterpillars
Neonicotinoid-treated corn and soybean fields have dramatically reduced milkweed on farmland
Sublethal neonicotinoid exposure impairs monarch navigation and immune function
US has lost an estimated 165 million acres of monarch breeding habitat since 1996

Welfare Considerations

Neonicotinoid pesticides affect monarch welfare through both habitat destruction and direct toxicity. Caterpillars that cannot find milkweed starve, while adult butterflies exposed to sublethal doses show navigation and immune impairment. Population collapse represents aggregate welfare failure across billions of individuals.

What You Can Do

Plant native milkweed in gardens to restore breeding habitat
Advocate for neonicotinoid restrictions on field crops
Support monarch waystation certification programs
Reduce use of all insecticides in gardens during monarch active season