
Chickadee
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.
A buzzy chick-a-dee-dee-dee or a clear, whistled fee-bee, the second note lower and often doubled.