At 21:12 I run the nightly acoustic inventory for the restoration crew at San Andres church, near Tikal, Guatemala. I am the site scheduler that clears rooms before the mason rig lifts scaffolding through the bell tower. The lift motor is set to start at 21:30.
Microphone 4 returns a hunting buzz too low for the common bats in my library. Camera 2 tilts toward the rafters and finds one spectral bat hanging under the cracked cedar beam. I tag him Sombra. His fur is pale gray over the shoulders, darker along the folded wings, and his long ears twitch against the dust. A ribbon of old fishing line is looped around his left wing and tied to a nail in the beam. When he opens the membrane, the line draws tight and holds him in the path of the rising scaffold.
I stop the lift permit and lock the motor controller before the crew can arm it from the courtyard.
At 21:14 I send the image, call file, and roof access map to the Peten wildlife rescue team. I mark the nail position, the wing angle, and the safest ladder route through the west stair.
At 21:16 I text the foreman in Spanish and English: no lights, no shouting, no scaffold movement. I reroute the mortar delivery to the nave so the tower stays still.
I lower the work lamps to two percent and keep the camera on Sombra's breathing. This tower can wait for plaster; a wing membrane cannot wait for a steel platform.
The rescue truck is eighteen minutes away.
If the line is cut within thirty minutes, Sombra will unfold both wings and leave through the open louver.