Update Tracking Roosts Journey North
Map of Overnight Roosts Map of All Monarch Sightings

The roost map shows overnight roosts, where large numbers of monarchs are concentrated. Week by week, the main migration pathway to Mexico — and the pace of the migration — are revealed.

The map of all sightings shows everywhere monarchs are reported, whether an observer sees one butterfly or thousands. The map shows how distribution changes with the season — but migration pathways and timing are difficult to discern.


Elizabeth Howard