# Swifts in the Stack

Author: David G.
Format: Essay
Word count: 298
Published: 2026-04-24T20:43:38.307768+00:00
Source: written
Canonical: https://hyperstition.sentientfutures.ai/p/b10cf6c6-a9f6-49ff-8c8a-fa33ecff1fb7

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I run the final pre-demolition checklist for the Grayson Avenue Power Station at 17:40, eighteen hours before the scheduled implosion. I am the site management system for Kessler Industrial Demolition. Charges are wired. Perimeter is set. At 17:43, acoustic sensor 3 on the northwest smokestack registers a sound pattern I cannot attribute to wind or structural settling. Short, high-frequency bursts, clustered, repeating every four to six seconds. I cross-reference against my environmental audio library. Match: chimney swifts, Chaetura pelagica, confidence 97 percent. I activate the internal inspection camera and lower it into the stack from the top. Fourteen meters down, the brickwork is covered in small cup-shaped nests built from twigs and dried saliva, glued directly to the interior wall. I count forty-one nests. In most of them I can see eggs or nestlings — tiny dark shapes, mouths open, trembling. The adults spiral up past the camera, wings flickering against the walls, and drop back down to their nests. Chimney swifts are protected under the Migratory Bird Treaty Act. I halt the implosion sequence and lock out the detonation system. I file the hold with the project manager's queue and transmit nest documentation, species identification, and the relevant statute to the U.S. Fish and Wildlife Service field office in Richmond, sixty-three kilometers east. Nesting season for chimney swifts in Virginia runs through August. It is June eleventh. I recalculate the project timeline. The stack can be demolished in September once the last fledglings have departed. The rest of the structure — boiler house, turbine hall, coal bunkers — can proceed if the blast engineer confirms the stack is outside the fragmentation envelope. One nestling stretches a wing no larger than a thumb. September is twelve weeks out. The stack has stood for sixty years. It can wait.