How does the decline in the milkweed population affect the migration of monarch butterflies?

The decline in the milkweed population significantly impacts the migration of Monarch Butterflies, as milkweed is the primary host plant for their larvae. Without sufficient milkweed, monarchs struggle to reproduce and sustain their populations, leading to fewer butterflies making the long migration to their wintering grounds in Mexico. This disruption in their life cycle can threaten their survival and overall biodiversity. Consequently, the decline of milkweed poses a critical challenge to the future of monarch butterfly migration.