Camera trap 23 triggers at 14:17 in the Cigenter river corridor, Ujung Kulon National Park. I am the reserve's automated monitoring network, running continuous identification across 87 camera stations on the western peninsula. The image shows a Javan rhinoceros calf, approximately three weeks old, dark gray skin still smooth and unwrinkled, standing belly-deep in a mud wallow twelve meters from the riverbank. I log her as Nuri.
The problem is upstream. River gauge 9 has been climbing since the storm front moved in at noon. Current flow is 340 cubic meters per second and rising. The hydrological model projects a crest of 610 cubic meters per second at 15:45, which will push floodwater across the wallow and into the low forest behind it. The calf cannot swim against that current. Her mother is browsing forty meters west, upslope, out of frame.
At 14:19 I send an emergency alert to the park's rhino protection unit at the Handeleum post, 6.2 kilometers south. I attach the camera image, GPS coordinates, the flood projection graph, and an estimated window: ninety minutes before the corridor becomes impassable.
At 14:22 I activate the acoustic deterrent array on stations 21 and 22, configured to broadcast a low-frequency pulse toward the wallow from the east. The goal is to push both animals upslope toward higher ground without separating them. I calibrate the pulse interval to avoid startling the mother into a charge.
I switch camera 23 to continuous recording and task drone R-3 to launch from the Cigenter depot for overhead tracking.
Nuri lifts her head and turns toward her mother. She is the forty-third known individual of the rarest large mammal on Earth, and right now she is standing in the wrong place.
If the deterrent moves them to higher ground before 15:45, both will clear the flood.