Millions of monarch butterflies are passing through Chicago as part of their annual 3,000-mile migration

There are many ways to experience the phenomenon. You can follow the monarchs’ surge at the Journey North website, a project of the University of Wisconsin at Madison Arboretum. You can also keep an eye out for orange wings when passing flowering plants such as zinnias, visit a nature preserve with monarch-tempting wildflowers or attend one of the region’s many monarch festivals.