Diet
Mostly insects, seeds, and berries. Diet varies with season; vegetable matter (seeds and fruits) may be no more than 10% of diet in summer, up to 50% in winter. Summer diet is mostly caterpillars and other insects, also some spiders, snails, and other invertebrates; also eats berries. In winter, feeds on insects (especially their eggs and pupae), seeds, berries, small fruits. Will eat fat of dead animals.