|Thanks to Cassie M. for her photos of a roost near Lone Tree, Iowa|
We are nearing peak migration, which is mid-September, for monarch butterflies traveling south through Iowa toward Mexico. Monarch butterflies only migrate during the day. They come down at night and gather in clusters. A cluster of butterflies is called a roost or a bivouac.
Read more at Journey North - Why Do Monarchs Form Overnight Roosts During Fall Migration?
There have been several roosts of monarch butterflies posted in our group.
- At the Monona Butterfly Gardens in Monona, Iowa, Clayton County.
- In West Des Moines, IA
- Southeast of Lone Tree, IA
100s of monarchs were seen in a field that was being mowed in Ames, IA
9/14 - hundreds of monarchs observed in a roost in Pella, IA
Keep your eye out for monarch butterfly roosts in the early evening. You might get lucky!