Northern Prairie Wildlife Research Center
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| Estimates of nest success (%) from pooled annual averages (unweighted) for mallards, gadwalls, blue-winged teals, northern shovelers, and northern pintails on study areas in the Prairie Pothole Region of Canada. |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/ducknest/canada/canada83.htm
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Menlo Park, CA [caww54]
