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About Fall Maps

Monarch Butterfly Migration Map: All Sightings, Fall 2011
All Sightings

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)
 

Monarch Butterfly Migration Map: Fall Roosts, Fall 2011
Overnight Roosts

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).
 

Monarch Butterfly Migration Map Peak Migration Events

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.
 

Monarch Butterfly Egg and Larva Observations, Fall 2014
Egg and Larva Sightings

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.
 

Monarch Butterfly Migration Map: Other Observations
Other Observations

This map shows observations that do not fit the above categories. People report monarchs they have raised indoors, tagged and released, etc.

ObserversNot seeing monarchs?

  • Report here if you have been watching but have not seen monarchs. This is called "absence data." Without absence data we wonder, are there no monarchs or simply no observers in various places?

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