Jul 12, 2009 – Monarch butterflies migrating to Mexico – Richard Ellis

• Four generations of butterflies will live and die on their eight-month migration from Canada to Mexico.
  No one knows how they find their way back
• Up to a billion monarch butterflies return to Michoacán forests each year, bending tree branches with their weight.
  Watch them
• Have you ever wondered what 50 or 60 million butterflies in one place would look like?
  Find out
• Every year, millions upon millions of monarch butterflies return here to spend the winter.
  Where is it?