Peromyscus maniculatus is omnivorous. It eats a wide variety of plant and animal matter depending on what is available, including insects and other invertebrates, seeds, fruits, flowers, nuts, and other plant products. Deer mice sometimes eat their own feces (coprophagy). In cooler climates, deer mice cache food in secret granaries during the autumn months (Baker 1983).
Animal Foods: insects; terrestrial non-insect arthropods
Plant Foods: seeds, grains, and nuts; fruit; flowers
Foraging Behavior: stores or caches food
Primary Diet: omnivore
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