Food for squirrels : Feed the squirrels nuts, organic fruit, eggs and nests, and chicks of birds. Squirrel diet differs from last season, at the beginning of the spring season squirrel feeds on buds and flowers, in addition to insects, mollusks, and small number of eggs, in summer they feed on fruits, either in the autumn feeding on seeds and nuts as conifers, nut, oak, and stored reserves for winter, by storing them in tree holes or buried underground.