AppearanceCrisp black cap and bib contrasting with white cheeks. Soft gray back and wings with buffy flanks. Tiny, rounded body and short straight bill.HabitatDeciduous and mixed forests, woodland edges, parks, and suburban areas with mature trees. One of the most frequent backyard feeder visitors.BehaviourAcrobatic and fearless — often the first bird to investigate a new feeder. Named for its clear two-note 'fee-bee' song and sharp 'chick-a-dee-dee-dee' alarm call. The number of 'dee' notes signals predator threat level.SeasonalityNon-migratory in most of range. May irrupt southward in large numbers when northern food sources fail.RangeNorthern North America from Alaska to northern California eastward across Canada and the northern United States.