Northern Prairie Wildlife Research Center
Waterfowl Communities in the Northern Plains
Ruddy Duck. -- Ruddy ducks have a distribution concentrated in the southern
Prairie Provinces and the Dakotas. Although the numbers of ruddy ducks continent-wide
showed a significant upward trend during the study period, this result appears
to be due to particularly high counts in a few years of the early 1980s (Fig.
14). Numbers at Woodworth also tended to increase and, in fact, mirrored the
continental population (r = 0.63).
Ruddy ducks were fairly strongly related to wetland counts at Woodworth
[r = 0.35; Johnson and Grier (1988) did not include this species in their
study]. No weather variable appeared to influence numbers of ruddy duck on
the study area.
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