Historic Records
# hectares | # acres | # butterflies

Graph of population estimate at monarch overwintering region in Mexico.

Guiding Questions

  • In which year was the population the highest? lowest?
  • What is the average population size from 1994/1995 to the present?
  • How does this year's population compare to the average?
  • How has the size of the monarch population changed during your lifetime?
  • What trends do you see in the data?