29/05/2026
You've had chickadees at the feeder for years. Same black cap, same white cheeks, same call from the hedge every morning. You've never questioned which species you're looking at.
There are two — and the difference is in the wing. The black-capped chickadee shows a bold white patch along the wing edge. The Carolina chickadee has plain gray wings. Same cap, same face, same size. The wing is the one-second diagnostic.
The song confirms it — two clear notes for the black-capped, four quick notes for the Carolina. Where the two species overlap in the central US, they hybridize. That hybrid zone is shifting northward as winters warm.
🐾 The one that got me: the tufted titmouse — the gray crested bird at the feeder who's in the same family — plucks hair from live animals to line her nest. Dogs, raccoons, opossums, sleeping humans. She lands, pulls, and flies. Scientists call it kleptotrichy.
Two more in the west most people never hear about — the mountain chickadee with a white eyebrow stripe, and the chestnut-backed chickadee with a rich brown back, tucked into Pacific Northwest conifer forests.
Five birds in one family. The wing edge separates the two you see every morning 🐾