This Week's Update Includes:

• News: Monarchs Arriving at Winter Home!
• Slideshow: The Arrival and Mexican Traditions
• The Migration: Maps and Journal

"We welcome the butterflies to their Mexican home!!!" Estela Romero writes this week.

Sightings Nearby
Two more observers confirmed arrivals at the monarch overwintering region. Thanks to Rocio Trevino of Correo Real for forwarding this news!

"On Sunday, one observer saw 33 monarchs per minute flying near Angangueo. Another saw five monarchs near the Sierra Chincua Sanctuary," reports Eligio Serrano Garcia.

South of the Border
Correo Real's network of observers monitors migration across Mexico. This week's Cold Front #8 finally carried more butterflies into the northern states of Coahuila and Nuevo Leon.

"Did Monday's sighting of 501 monarchs in 20 minutes in Nuevo Leon represent peak migration from the Texas central flyway?" wonders Rocio.

Texas Coastal Flyway
After seeing 60 monarchs in 20 minutes on Sunday the Aschens reported from Port Lavaca, Texas:

"The Coastal Migration of MONARCHS has begun across Lavaca Bay!"

Regions to Watch
This maps shows the three key regions we're continuing to watch. We hope to see signs of monarchs from the east heading to Mexico. With so few monarchs from the Midwest this year, the overwintering population may be at an historic low.

• How are Mexico's traditions connected to the arrival of monarchs? This week's slideshow explores that essential question.