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Canvasback (Aythya valisineria)

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Former Abundance

On a November day in the late 1960s, flying in a light plane along the Mississippi River, the eminent waterfowl biologist Frank Bellrose came upon a raft of 450,000 Lesser Scaups that stretched for miles. Protection, restoration, and enhancement of habitats used during all seasons are under way... read more »


Detroit River International Wildlife Refuge

The United States is home to more than 550 National Wildlife Refuges - havens for wildlife, including this Canvasback. But only one refuge can claim the distinction of being international: the Detroit River International Wildlife Refuge. It hosts millions of migratory ducks annually... read more »


Wetland Birds Thrive

While nearly a third of North American bird species are in decline, many birds that depend on wetlands are thriving. Duck breeding populations in 2009 were an estimated 25% above historical averages. Conditions on the breeding grounds have improved since the drought years of the 1980s, but human... read more »

Topics & Themes:  human interaction