WATCH: Millions of monarch butterflies migrating to Mexico

Myriads of bright orange and black monarch butterflies are making their annual 3,000-mile journey from as far north as Canada to southern California and Mexico.

NBC reports that the number of the monarch butterflies has plummeted in recent years. About 35 million butterflies migrated last year compared to a billion in 1996, experts say. Research explain this by the climate change, habitat loss and pesticides.

An organic fertilizer is being spread throughout Mexico’s forests to help protect the butterflies.

The butterfly migration attracts tourists from all over the world. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others and keep the conversation on topic and civil. If you see an inappropriate comment, please flag it for our moderators to review.

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