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Waterfowl and Habitat Changes
After 40 Years on the Waubay Study Area

Table 13. Percent of over-water nests for five waterfowl species found in different wetland classes (Stewart and Kantrud 1971) in the Waubay study area, Day County, South Dakota, 1992-1993.
*Species*	n^a	*Class III*	*Class IV*
Mallard	27	14.8	85.2
Northern pintail	2	100.0	0.0
Redhead	72	6.9	93.1
Canvasback	20	0.0	100.0
Ruddy duck	24	12.5	87.5
Total	145	9.7	90.3
^a Includes some nests already terminated when found.

U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/waubay/tab13.htm
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