How to find Purple Martin roosts on weather radar!


Purple Martins form flocks of up to hundreds of thousands of birds before migrating south to Brazil each year! These groups are so big that they can be located through weather radar!!!

Follow along in this video as we show you how to use free software from NOAA to access, analyze, and locate one of these amazing roosts near you. You’ll need to download the Weather and Climate Toolkit from here:

Make sure to report any roosts you visit at

East of the Rocky Mountains, Purple Martins 100% rely on humans to provide nesting habitat. Learn more about Purple Martins and why they need our help at


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