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Food-niche breadth and dietary evenness of Snowy Owls.

LocationNo. Prey% Mammals% Microtusa% AvianFNBDIEVSource
Montana4680 99.899.5 0.21.280.428Detienne et. al. 2008
Ontario, Can314 100 90.4 0.01.490.441Catling 1973
Alberta, Can24093.3 29.9 6.73.260.647Boxall and Lein 1982
Br. Col., Can2120.0 0.01007.730.584Campbell & MacColl 1978
Michigan185100 85.90.0 1.650.509Chamberlin 1980
New England13651.525.747.813.850.559Gross 1944
Michigan12199.266.70.82.990.552Allan 1977
Mean4.610.531
SD±4.64±0.078

a % Microtus = % of Mammals that are Microtus spp.

Source: Detienne et. al 2008