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Joshua J. Cotten

By Mark Waghorn via SWNS

The great migration of monarch butterflies from Canada to Mexico is down to white spots on the edge of their wings, according to new research.

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Migratory monarchs have larger and more white spots than non-migratory relatives. (Butterflies of America via SWNS)

Originally published on talker.news, part of the BLOX Digital Content Exchange.

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