Wikipedia- Kaitlyn

The extent to which various taxa are eaten by spotted owls varies temporally. Both annual ^[73][76] and seasonal variation in the composition of spotted owl diets has been observed. For instance, pocket gophers, voles, insects, and rabbits are hunted more by spotted owls in the summer than in the winter.^[30][73] In coniferous forests of the Sierra National Forest, birds comprised 12.9% of the California spotted owl's diet during the breeding season but only 4.6% during the nonbreeding season.^[74]