Although the mountain chickadee is the black-capped’s closest relative, the Carolina chickadee likely will cause the most trouble, especially in late spring and summer when the black-capped’s ...

The Carolina chickadee’s geographic range overlaps the black-capped. Listen and look for differences ... picking off insects of any stage—eggs, larvae, pupae, adults—from leaves and branches.

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 ...