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Monarch Butterflies Face Climate Threats During 3,000-Mile Migration

3/31/2026

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Summary

Story summary

Monarch butterfly (Danaus plexippus) undertakes a migration of more than 3,000 miles from Mexico to the Northeast United States.
The migration spans up to four generations.
The second generation enters reproductive diapause to survive winter.
In spring, the first generation migrates north to feed on blooming milkweed.
Climate change poses a significant threat to their migration patterns and survival.

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Story summary

Monarch butterfly (Danaus plexippus) undertakes a migration of more than 3,000 miles from Mexico to the Northeast United States.
The migration spans up to four generations.
The second generation enters reproductive diapause to survive winter.
In spring, the first generation migrates north to feed on blooming milkweed.
Climate change poses a significant threat to their migration patterns and survival.