Monarch Migration: King of Butterflies to Arrive in South Texas

September 24, 2014 4:00 AM

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From habitat loss to global warming to pollution, monarch butterflies face a host of threats that have negatively impacted the species.

The monarch has the longest migration of any butterfly. Twice a year, the butterflies make a 3,000-mile-long journey. In the fall, the butterflies leave roosts that are as far north as Canada and head south into Mexico. In the spring, monarchs head back north. No one knows how the butterflies find t...

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