What Do Squirrels Eat?

What Squirrels Typically Eat

Squirrels are primarily herbivorous but exhibit adaptable feeding behaviors depending on species, season, and food availability. In the wild, their core diet includes nuts, seeds, fruits, buds, and green vegetation. Tree squirrels such as gray and fox squirrels rely heavily on mast crops like acorns and hickory nuts, while red squirrels favor conifer seeds. Ground squirrels consume more plant matter and fungi, whereas flying squirrels often incorporate insects and other protein sources. Food preferences shift seasonally, with cached nuts sustaining them through winter when fresh foods are scarce.

Primary Food Sources

nuts and seeds

Nuts and seeds form the dietary foundation for most squirrel species. Acorns, walnuts, hickory nuts, beechnuts, and pine seeds are energy-dense staples. Squirrels cache surplus nuts in scattered hoards, aiding forest regeneration yet creating conflicts near bird feeders and gardens. Their sharp incisors and cheek pouches enable efficient collection and transport. Preferences vary by species and local abundance, but access to a diversity of nut types supports better winter survival and reproduction.

Fruits and Vegetables

When available, fruits offer quick sugars and moisture. Apples, pears, plums, and berries are frequently taken from trees and shrubs. Garden crops like corn, tomatoes, squash, and leafy greens are also consumed, sometimes causing damage in cultivated areas. In urban settings, squirrels may raid ornamental plants and backyard gardens. While fruits and vegetables supplement nutrition, they lack the fat content of nuts and are less suitable as exclusive foods.

Seasonal and Environmental Influences

Squirrel diets adjust with seasonal availability. In spring, they consume tree buds, shoots, and emerging vegetation, and may prey on insects and bird eggs to meet protein needs during the breeding period. Summer brings a wider array of fruits, fungi, and green plant matter. Autumn centers on harvesting and caching nuts and seeds to survive winter. In colder climates, ground ice and snow can limit foraging, making cached foods critical. Species in Mediterranean or tropical zones experience milder shifts, with consistent access to mast and fruits year-round.

Urban and Backyard Feeding Considerations

Around human development, squirrels exploit bird feeders, pet food, compost, and garden crops. While feeding wildlife can seem benign, concentrated foods may increase conflict, alter natural foraging, and elevate disease transmission. If choosing to provide food, use platform or hanging feeders designed to limit waste, avoid processed human foods, and remove excess nuts to discourage dependency. Secure trash and protect vulnerable plants without aiming to eliminate wildlife presence.

Health, Safety, and Conservation Notes

Squirrels play vital ecological roles as seed dispersers and prey animals. They can carry diseases such as leptospirosis and parasites via ticks and fleas, so handling sick or injured individuals should be minimized. Legal protections vary by jurisdiction; in most regions it is unlawful to trap or relocate squirrels without permits. Preventive measures include trimming branches away from structures, sealing attic entry points, and using squirrel-proof bird feeders. These strategies reduce nuisance interactions while supporting healthy populations.

Summary of Dietary Patterns

• Primary components are nuts and seeds, selected for high energy density and storability.
• Fruits, vegetables, buds, and green vegetation provide vitamins, moisture, and seasonal variety.
• Protein from insects, eggs, and small vertebrates supplements herb-based diets, especially in spring.
• Food caching ensures winter survival and inadvertently supports forest regeneration.
• Urban settings expand food options but can increase conflicts; managed feeding balances attraction and risk.