“It’s a groundbreaking finding,” said Ryan Norris, a Guelph professor of integrative biology and author of the study.

He said it solves the long-standing puzzle of why monarchs always appear later on the east coast than the interior. Previously, it had been believed that all monarchs migrated directly north, but it’s not as simple as that.“

This is another roadblock that these amazing butterflies have managed to overcome in their annual cycle.”

via Monarchs’ incredible journey takes new direction – thestar.com.

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