How Many Monarchs in a Single Photo?
Arriving in Mexico, November 5, 2005

This spectacular photo was taken as thousands upon thousands of butterflies reached their winter home in Mexico.

  • How many monarchs do you see in this single patch of sky?
  • How would you answer such a question?

Think, then see see how we went about the problem. >>

Photo: Carlos Galindo-Leal, World Wildlife Fund-México