About Fall
Maps |
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All Sightings
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This map shows when and where monarchs were present. All monarchs people report appear on this map, whether a person sees one butterfly or thousands, whether the monarchs are migrating or not.
Observers—report Adult Monarchs and include:
- The number of monarchs seen.
- The length of time observing (1 hour, 1 minute)
- The butterfly's behavior (nectaring, flying)
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Roosts
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Monarchs rest at overnight roosts at the end of each migration day.
This map shows where roosting butterflies were reported.
Observers—report Fall Roost and include:
- The number (estimate) of monarch at the roost.
- The length of time the roost remained (1 day, 1 week)
- Notes about behavior (time arrived, time departed), weather (wind direction, storm systems) and habitat (landscape, nectar).
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Peak Migration Events
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Spectacular sightings—or the season's biggest waves of migration—are
shown on this map. It shows when and where peak migration events occur.
Observers—report Peak Migration.
- Don't hesitate to report an event as "peak" if you believe it is. We review all sightings carefully and will contact you with questions.
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Eggs and Larvae
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This map shows when and where monarchs are still breeding.
Observers—Report sightings of monarch eggs and larvae, from August through December.
- In the north: watch for the last evidence of eggs and larvae, as early as mid-August, when monarchs stop breeding and become migratory.
- In the south: watch for monarchs to appear and lay eggs, as early as July to as late as December.
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