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What Do Sightings Around the Great Lakes Reveal?

This map shows where people have reported monarchs resting in roosts during this fall's migration.

  • What information does this map reveal?
  • What questions does this map raise about monarch migration in relation to the Great Lakes?
  • What hypotheses might explain the location of roosts around the Great Lakes?

Something to Think About
Monarch sightings are made by people. Why is this fact important to keep in mind when you interpret migration maps?

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