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Ducks were once a conservation bright spot. Now they're declining in the US, new report showsThe work draws on survey data from the U.S. Geological Survey, U.S. Fish and Wildlife Service and citizen projects such as Cornell's eBird. There are some 2,000 bird species in North America. A third ...
U.S. Fish and Wildlife Service and citizen projects such as Cornell’s eBird. There are some 2,000 bird species in North America. A third of the species examined are rated as high or moderate ...
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