How
long does one butterfly stay at a roost?
People often tag monarchs hoping to find out how long individual butterflies stay at a roost. The person who tagged the two butterflies pictured here wondered: For how many days will these same butterflies be here—and will I be able to find them?
![](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/monarch/FallRoostViger2001_01b_500.jpg)
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