The most widespread, numerous, and geographically variable chickadee, this bird brightens winter days at bird feeders and eagerly takes advantage of nest boxes. It is curious, with little or no ...

Lost your keys? Can't remember where you parked the car? If only you had the memory of a mountain chickadee. These half-ounce birds, with brains slightly larger than a pea, stash tens of thousands ...

The chestnut-backed chickadee is curious about humans, and spends the postbreeding and winter seasons foraging noisily in mixed-species flocks. Unlike other parids (except for the mountain ...

Black-capped and mountain chickadees are closely-related species that co-occur in Boulder County but occupy different habitats based on elevation. The Boulder Chickadee Study leverages an extensive ...