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Winter Foraging Behavior of Short-eared Owls (Asio flammeus) in Ohio
Bruce A. Colvin and Steven R. Spaulding
The American Midland Naturalist
Vol. 110, No. 1 (Jul., 1983), pp. 124-128
Published by: The University of Notre Dame
Stable URL: http://www.jstor.org/stable/2425218
Page Count: 5
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Foraging behavior was examined in a wintering group of short-eared owls in NW Ohio in 1981. A total of 2185 prey items were identified. Meadow vole (Microtus pennsylvanicus) constituted 95.4% of total prey The percentage of Peromyscus spp. taken was significantly greater when there was snow cover Comparison of the frequency of prey taken with the frequency of small mammals present showed that more meadow voles and fewer deer mice were taken than would occur by chance alone. Meadow voles are larger than deer mice, and hunting them may be more energy-efficient.
The American Midland Naturalist © 1983 The University of Notre Dame