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Wildlife Monographs

Red Fox Predation on Breeding Ducks
in Midcontinent North America

Tables


Table 7. Incidence of ducks at red fox rearing dens visited in duck nesting ground sample areas of midcontinent North America, 1968-73.

North Dakota South Dakota
Iowa Minn.-
Wis.
East rivera West riverb East rivera West riverb
Years 69-70 68-70 68-73 68-70 68-70 68-70
No. fox dens 193 52 648 91 109 298
No. ducks at surface of dens 2 20 1164 23 65 159
Fox predation rate index (surface ducks/den) 0.01 0.38 1.80 0.25 0.60 0.53
Dens with ducks on surface (%) 1 31 63 23 36 33


aEast of the Missouri River.
bWest of the Missouri River.

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