Thousands of Monarch Butterflies Are Making Their Way Through Indiana Right Now
Fall has officially arrived in Indiana, and while we're all busy thinking about pumpkins, changing leaves, and cooler temperatures, something pretty incredible is happening right over our heads.
The annual monarch migration is underway, and monarch butterflies are making their way through Indiana right now.
Monarch Butterflies Are Heading South
Every fall, monarch butterflies from the northern United States and Canada begin an extraordinary journey toward their wintering grounds in central Mexico.
And we're talking about a seriously impressive "road trip" for something that weighs less than a paperclip.
Monarchs can travel thousands of miles during their fall migration, with the butterflies we see passing through Indiana ultimately continuing south toward Mexico.
This isn't just a continuation of the butterflies we've watched all summer, either. The fall migratory generation is special. These monarchs delay reproduction and live much longer than the generations that came before them, allowing them to complete the enormous journey south.
The 2026 Monarch Migration Is Underway in Indiana
We're already seeing evidence of the 2026 migration moving through the Midwest.
Journey North, which tracks monarch migration using observations submitted by volunteers, reports that monarch roost sightings have been progressing south through the Great Lakes region and into Indiana and Illinois. One observer in Richmond, Indiana reported 83 monarchs roosting together on September 8.
Researchers are even tracking some individual monarchs through Indiana this year. Twenty radio-tagged butterflies had reached northern Indiana by September 7, including monarchs originally tagged around Toronto, upstate New York, and Montreal.
Keep an Eye Out for Monarch Roosts
Watch out over the next few weeks.
Monarchs generally migrate individually during the day, but when evening arrives, they may gather together in trees to spend the night. These temporary gatherings are called roosts, and they can include anything from a handful of butterflies to hundreds or even thousands at once.
Trees that provide protection from the wind, especially those near good sources of nectar, can become temporary overnight stops along their journey.
So if you suddenly notice a tree filled with orange and black wings this fall, you may be witnessing one of nature's coolest road-trip rest stops.
You Can Help Track Migration
You don't have to be a scientist to contribute to what researchers know about monarch migration.
Journey North relies on citizen scientists to report monarch sightings and fall roosts. Those observations help researchers follow the migration as it moves across North America.
Take a look around over the next few weeks when you're outside.
Those little orange and black butterflies passing overhead may have already traveled hundreds of miles.
And they've still got a long way to go.
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Gallery Credit: Kat Mykals