Impact of Red Fox Predation on the Sex Ratio of Prairie Mallards
Figure 10: The Breaking of Virgin Prairie Sod in North Dakota
Fig 10. The breaking of virgin prairie sod in the treeless pothole region of North Dakota in the early 1900's. Photo courtesy of North Dakota Game and Fish Department.
Previous Section-- Figure 9: The North American Breeding Range of the Mallard
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Next Section-- Figure 11: Turn-of-the-century Photo Showing the Large Number of Waterfowl Killed by Hunters
