Monarch Butterfly Migration News

Fall 2015
August - November
Watch this season's story unfold.
Monarch butterfly migration
Monarch Butterfly Nectaring on Milkweed
Monarch butterfly nectaring on goldenrod
About Fall Migration
August - November

Track the monarch's migration to Mexico. Weekly news updates are posted on Thursdays.

Final Generation
August 1, 2015

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

Migration Season Begins
August 20, 2015

Share your sightings and help tell the story of the monarch's migration to Mexico. The first signs of migration are expected any day.

Monarch butterfly nectaring and migrating Monarch Butterfly Nectaring on Milkweed Monarch Butterfly Migration: The Overnight Roost
Migration Building
August 27, 2015

Sightings of southbound monarchs and the first overnight roosts are clear signs that migration is underway.

Stop and Go
September 3, 2015

The stopover sites monarchs use to rest and refuel are critical for migration — and for successful overwintering in Mexico.

Southbound Butterflies
September 10, 2015

People are counting monarchs roosting by the hundreds, feeding by the dozens, and flying overhead at rates up to 2 per minute.

Monarch Butterfly Migration: The Effects of Wind Monarch Butterfly Monarch Butterfly

Peak for Great Lakes
September 17, 2015

As peak migration struck the Great Lakes this week observers saw how the wind affected our tiny travelers.

Riding a Cold Front
September 24, 2015

Monarchs filled the sky as a cold front crossed Kansas. Butterflies dropped down by the dozens to nectar in the gardens below.

Off With the Wind
October 1, 2015

A continuous stream of monarchs crossed Oklahoma on Tuesday and the migration is poised to enter Texas next.

Monarch Butterfly Monarch Butterfly Monarch Butterfly

Funneling into Texas
October 8, 2015

”There were literally thousands, coming in big and small bands like snow flurries..." And so began the mass migration into Texas.

Crossing the Border
October 15, 2015

Butterflies are crossing the border and streaming into northern Mexico after another peak week in Texas.

Streaming Across Mexico
October 22, 2015

The monarchs are crossing Mexico on the final 500 miles of migration.

Monarch Butterfly Monarch Butterflies Arriving in Mexico Monarch Butterflies

Almost There...
October 29, 2015

First arrivals are expected any moment at the monarch's winter home in Mexico.

November 3, 2015

Crossing the finish line after a long migration.

They're Home!
November 24, 2015

The overwintering season in Mexico is now underway. Predictions say the population may have doubled since last year.



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 2015