Impact of Red Fox Predation on the Sex Ratio of Prairie Mallards
Table 6: Incidence of Mallards Found Above Ground at Red Fox Rearing Dens
Table 6. Incidence of mallards found above ground at red fox rearing dens in eastern North Dakota.
| Year | Number of mallards per den | ||
| 1969 | |||
| 1970 | |||
| 1971 | |||
| 1972 | |||
| 1973 |
Previous Section-- Table 5: Estimates of Mallard Spring Breeding Population
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Next Section-- Table 7: Location of Mallards in Food Remains at Excavated Red Fox Dens
