Episode
Chimney Swifts - Can't Perch, Can't Walk, and Barely Lands
- Published
- Sep 9, 2026
- Duration seconds
- 699
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Summary
# The Bird That Never Perches: A Chimney Swift Roost at Dusk This week I stood on a picnic table with a few hundred strangers, watching what looked like a tornado of birds pour into a school chimney. It took almost three hours, and by the end I understood exactly why people show up for this every single year. **A Bird Built Only for the Air** Chimney swifts eat, drink, bathe, and even mate in flight. Their feet are built for one thing: clinging to a rough vertical wall. They can't perch on a wire or hop around on the ground like a robin. If they aren't flying, they're clinging to something. **The Long Wait at the Roost** The show doesn't happen all at once. Birds circle and chatter overhead for hours before a few scouts peel off and test the chimney. As the light fades, the funnel tightens until the bulk of the flock finally pours in together, more like water going down a drain than anything organized by a leader. **Packed In Like Shingles** Inside, the swifts cling to the rough brick with their tail feathers, the same trick woodpeckers use on a tree trunk, and stack in tight, overlapping rows. Their combined body heat helps keep the whole roost warm overnight. **The Century-Old Mystery of Where They Go** For decades, nobody knew where chimney swifts disappeared to every winter. Banding studies eventually traced them to the upper Amazon basin in Peru, and more recent tracking shows them drifting on through Venezuela and Brazil before the long flight back north each spring. **A Vanishing Kind of Chimney** Swifts once nested in old hollow trees, then adapted to brick chimneys once those trees disappeared. Now schools and old buildings are being torn down or capped, and the chimneys that host these massive roosts are getting harder to find, which is why the school in my t…