Size of Owl Prey
Rabbits, hares, grouse, ducks
Chipmunks, squirrels
Voles, lemmings, shrews, mice, songbirds
50 - 75%
10 - 40%
10 - 15%
Great Horned
10 - 50%
10 - 70%
35 - 90%
Snowy
≤ 5%
≤ 5%
90 - 97%
Great Gray
Large
Medium
Small
•Great Gray Owl takes almost entirely small prey, which typically forages under the snow in winter.
•Snowy and Great Horned Owl take substantial amounts of medium- and large-sized prey, consistent with their larger foot size.
•Snowy and Great Horned Owl are flexible in their prey choice.  Snowy prefers lemmings but will take larger prey when necessary.  Great Horned has largest feet and prefers largest prey, but will take all sizes as available.
•Medium and large prey are mostly found above, not under, snow cover.