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Fall Monarch Migration Map Archives
Location of Overnight Roosts
2004 to present
(Also see Spring Migration Map Archives)

The maps below show when and where people saw monarchs forming overnight roosts during fall migration. How does the monarch's fall migration compare from one year to the next? Review the maps and answer the questions below.

All Years
(Fall 2002-present)
animation/map/data
Fall 2009
vs. 2002-2008
map/data
Fall 2009
animation/map/data

Fall 2008
animation/map/data
Fall 2007
animation/map/data

Fall 2006
animation/map/data

Additional Fall Migration Maps
The maps on this page only show where people reported roosts during fall migration. For additional fall monarch migration maps from past years ("Peak Migration" and "All sightings"), see Maps and Data from Past Seasons
Fall 2005
animation/map/data
Fall 2004
animation/map/data

Try This:

  • Describe the ways that the migrations similar from one year to the next.
  • How are they different? Describe.
  • List all the factors you think might cause the migrations to be different from one year to the next.
  • List all the factors that might cause the data to be different from year to year. Review the lesson, "You're the Scientist: Verifying Data Collected by Peers." Have a classroom discussion, and make a list of questions generated in your class.
  • What do the maps tell you about monarch migration?
  • What don't they tell you?

 

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