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)

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).

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.

Eggs and Larvae

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.