Roost rings are back: Massive flocks of birds visible on Detroit radar Saturday morning

Storm Tracker 4 captures large flocks of birds

Local 4's Paul Gross explains the large rings visible on Storm Tracker 4 Saturday morning -- and, believe it or not, they're made of birds.

DETROIT – After making an appearance Wednesday, roost rings have cropped up again on the Metro Detroit radar Saturday morning.

Local 4′s Paul Gross says the rings are large flocks of birds waking up at dawn and flying away in all directions.

See the roost rings in action on our Storm Tracker 4 radar in the video player above.

More: Metro Detroit weather: Cool start to sunny summer Saturday

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About the Authors:

Local 4 meteorologist Paul Gross was born in Detroit and has spent his entire life and career right here in southeast Michigan. Paul has researched, written and produced eight half-hour documentaries for WDIV, as well as many science, historical and environmental stories.

Cassidy Johncox is a senior digital news editor covering stories across the spectrum, with a special focus on politics and community issues.