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Fall 2017
August - November

Watch this season's story unfold.

Monarch butterfly migration
Monarch Butterfly Caterpillar on Milkweed
Monarch Butterfly
About Fall Migration
August - November

Join us as we track the monarch's migration to Mexico.

Migration Starts This Month
August 1, 2017

The magnificent migratory generation is developing now. Watch for the 1st signs of fall migration in mid-August.

Tracking Begins!
August 24, 2017

Sightings of southbound butterflies, intense nectaring, and the first overnight roosts are being reported.



Monarch Butterfly
Monarch Butterfly Monarch Butterfly
The Overnight Roost
August 31, 2017

Overnight roosts are a traditional sign of fall migration. What can we learn by studying them?

A 300-Mile Advance
September 7, 2017

The migration advanced 300 miles in just two weeks. How long does one monarch's journey take?

Moving into Kansas
September 14, 2017

The migration's leading edge is now 1,400 miles from Mexico. How do hurricanes affect migration?

Monarch Butterfly    
Warm Fall, Slow Migration
September 21, 2017

The migration's leading edge has stalled in the Midwest, where headwinds are holding the butterflies back.



Tracking Migration with Journey North
Report your sightings to each fall and spring as the monarchs travel to and from Mexico. Track migration on real-time migration maps. Help scientists learn more about monarchs.


Archives: Spring 2017