How Many Monarchs in a Single Photo?
Arriving in Mexico, November 5, 2005
(Back to start.)

This is a close-up view of one square.

  • We counted as many butterflies as we could see in this square. (Try it! Click on the image and print it out. Cross it off each butterfly as you count it.)
  • After we had the total for this square, what do you think we did next to estimate of the total number in the single photo?

Think, then read on.... >>