WPAs: America’s Duck Factories
10,000 Birds
MARCH 8, 2017
The Prairie Pothole Region of the United States—about 100,000 square miles of the northern Great Plains—is characterized by depressions or basins created retreating glaciers. The region has justifiably been referred to as the “Duck Factory of North America.” What are WPAs and why should birders care about them?
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