"It's official!" says Estela Romero. The first monarchs have reached their winter home in Mexico. Meanwhile, it's peak migration across northern Mexico as the butterflies funnel homeward. This week, explore the possible pathway monarchs take. Why does Dr. Calvert say it's "delightfully confusing"?

This Week's Update Includes:

• News: First Monarchs Reach Winter Home in Mexico!
• Nonfiction Reading: Explore the Possible Pathway
• The Migration: Maps and Journal Page

News: First Monarchs Reach Winter Home in Mexico!

"The monarchs are here!" exclaimed Estela Romero last Friday. After watching for them daily—and recording zeros on her chart since the first of October—she greeted the monarchs with enthusiasm:

• The Monarchs have arrived!
• Las monarcas han llegado!

Only 60 miles north of the overwintering region, Naomi Suss watched monarchs flying overhead on Tuesday evening: "They are flying high and fast, so I think many of them will arrive at the reserves today," she wrote from her home in Tequisquiapan, Querataro.

Peak Migration Across Northern Mexico
"Butterflies are flying all along their migration route in Mexico," reports Señora Rocío Treviño who coordinates Mexico's migration-tracking program, Correo Real.

"People are reporting monarchs now from the northern state of Coahuila all the way to Michoacan. We have a large gap, for lack of reports, in the states of San Luis Potosi, Guanajuato and Queretaro," says Rocio.

She encouraged everyone to enjoy the monarchs and, as the song says:

Migration Continues from the North
It's almost November but monarchs are still migrating out of the north. Look at the map of all monarch sightings and see if you can find:

• The northernmost monarch recently reported.
• The last date a monarch was sighted in Canada.
• The latest news from the Texas Gulf coast.