Monarch Butterflies Continue Their Fall Migration

October 25, 2023 by Nancy Sheehan, Program Coordinator

Roosts were sighted as far south as Saltillo, COA, Mexico. Numbers along the California coast are beginning to swell. Here at Journey North's administrative home, UW-Madison Arboretum, visitors wish the monarch safe flying on their journey south.

Monarch Roosting in Saltillo, COA, Mexico. Reporte enviado por Aldo Ceballos a Correo Real/PROFAUNA A.C. (10/19/2023)

Eastern Monarch Population

There is only one week until November 1st and the Dias de Muertos. The Eastern monarch population is not far from reaching the overwintering sanctuaries in central Mexico.  

Read more in the Eastern Monarch Fall Report #5>>

Western Monarch Population

Gail Morris shares in her report this week that monarchs are appearing in all western states, and the first monarchs are arriving at the northernmost California overwintering sites.

Read more in the Western Monarch Fall Report #4>>

Celebrating The Journey South at the UW-Madison Arboretum

An interactive exhibit encourages visitors to the UW-Madison Arboretum to celebrate monarch migration. 

View this story in this slideshow>>

Please Keep Reporting

Please continue to report any monarch activity you observe to Journey North. Your reports provide valuable information about monarchs and their migration.

Thank you!