Formed by retreating glaciers 10,000 years ago, Prairie pothole wetlands are shallow, freshwater marshes scattered across the Great Plains. They provide vital waterfowl habitat. According to the EPA, about half of all prairie potholes have been drained or altered for agricultural use.
Prairie pothole wetlands are shallow, freshwater marshes scattered across the Great Plains of North America. Formed by retreating glaciers 10,000 years ago, this immense number of small, pocket-like water bodies fill with spring snowmelt and rain, creating a “duck factory” ecosystem.
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The Great Buffalo Roundup

On September 29th over 1,400 bison were rounded up at Custer State Park in western South Dakota. The remarkable event, now in its 58th year, drew over 20,000 visitors from around the world