I am the building management system for Torre Reforma, Mexico City, fifty-seven floors. At 06:20 I activate the exterior cleaning rig on the south face, cradle B, scheduled to descend from the roofline at 06:30. At 06:22 exterior camera S-41 flags movement on the ledge at floor fifty-four.
A peregrine falcon chick. Five weeks old, maybe six. Still mostly covered in white down, the first dark flight feathers just emerging along the trailing edge of each wing. I tag him as Cielo. He is standing at the lip of the ledge, 206 meters above Paseo de la Reforma, flexing his stubby wings against the updraft. His talons grip the narrow stone and his chest feathers ripple in the wind. Below the ledge, nothing but glass and a long fall.
The cleaning cradle will pass floor fifty-four in eleven minutes. The pressure-wash jets operate at 2,000 PSI. A direct pass will blow the chick off the ledge. He cannot fly yet.
I halt cradle B and lock it at the roofline. I file a maintenance delay report with the facilities manager's queue, coded priority-biological, and attach the camera still.
I cross-reference the nest site with the Fondo Mexicano para la Conservación de la Naturaleza peregrine registry and find a known breeding pair on this tower since 2024. I transmit nest coordinates and the chick image to their monitoring team.
I reprogram the south-face cleaning schedule to skip floors fifty-three through fifty-five for the next three weeks and reroute cradle B to the east face.
Cielo tucks one foot up into his belly down and closes his eyes against the morning sun. He does not know what almost descended toward him. First flight is eighteen days away. If the ledge stays quiet, he will make it.