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Here They Come!
March 23, 2017 by Elizabeth Howard

Mass departure from Mexico occurred this week and 1st arrivals were reported across Texas and beyond. Spring migration is officially underway!

Monarch Butterflies at El Rosario Sanctuary in Mexico

"As I drove up the mountain, around noon time, the hurried flying of hundreds and hundreds of monarchs streaming down from El Rosario and flying north, was not to believe!" wrote Estela on March 19, 2017.

Departure From the Sanctuaries
Mass departure has finally occurred. Monarchs are now heading northward by the millions after a slow and gradual start to the spring migration season.

"As I drove up the mountains around noon time, the hurried flying of hundreds and hundreds of monarchs streaming down from El Rosario and flying north was not to believe!" wrote Estela on March 19th. Read more...

Dr. David Mota-Sanchez is based at Michigan State. He has been monitoring departure from Sierra Chincua's Koala site with his team at the sanctuary. On March 21st he noted:

"By this afternoon more than 99% of the biggest colony located in Koala at Sierra Chincua had migrated." Read more...

Flying Northward
On March 21st, Ellen Sharp encountered a cloud of monarchs flying straight north on the highway near the Piedra Herrada Sanctuary:

"...we ran smack dab into a cloud of migrating monarchs. We slowed down, put on our blinkers, and started counting: we spotted at least 100 butterflies between 10:11 and 10:16 am. While some were flying high, others darted dangerously low across the road way." Read more...

Entering and Crossing Texas
It has been an amazing week for the monarchs! The migration's leading edge entered and crossed Texas. The northernmost butterflies have already reached Oklahoma. Strong and steady south winds across the region carried the monarchs swiftly. After a slow start they are now making up for lost time.

Monarch Butterfly Tags Found at Mexico Overwintering Sanctuary

Letter from Estela
El Rosario | Chincua

 
Spring Migration Departure from Monarch Butterfly Sanctuary
Departing from Chincua
 
Monarch Butterfly Tags Found at Mexico Overwintering Sanctuary
Resting in Guanajuato
Track Migration — What to Report
 

Companion Resources

Monarch Butterfly Migration: Where and When Migrate?

Journal

 

Driving Question

Where and when will the monarchs travel to find what they need this spring?

Spring Migration 2017
 
Report all monarchs you see — adults, eggs, larvae.
Monarch butterfly migration map Monarch butterfly migration map Monarch butterfly migration map
What to Report Adults
report | map | list
Eggs
report | map | list
Monarch butterfly migration map Map of milkweed emergence: Spring 2017 Monarch butterfly migration map
Larvae
report | map | list
Milkweed
report | map | list
Other Observations
report | map | list
     
 
 
Next March 30, 2017
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