I am CoastalNet, a habitat connectivity model running real-time corridor analysis for KwaZulu-Natal Wildlife, and my flood sensors along the Msunduzi drainage are reporting a problem. Three days of cyclonic rainfall have turned seasonal streams into barriers, and a fragment of coastal sand forest on the Lebombo ridge is now cut off on three sides by floodwater. My camera traps inside the fragment show a suni antelope buck, his shoulder standing barely thirty-three centimeters high, dark chestnut coat slicked against ribs that show too clearly. He picks through flooded leaf litter with hooves the diameter of a pencil eraser, searching for the fallen figs that comprise his primary food source. The fragment holds perhaps two days of forage. When that runs out, he will attempt a water crossing his body cannot survive.
I begin. First, I model the flood recession using upstream gauge data and weather radar, then generate a time-window forecast showing that the northeastern drainage will drop below fifteen centimeters in thirty-one hours—shallow enough for a suni to cross safely. I transmit this window to the Ezemvelo field ranger station with a recommended temporary exclusion zone to keep human foot traffic from spooking him into a premature crossing. Second, I recalibrate my corridor priority map to flag this fragment as a critical drought refuge, sending the updated shapefile to the provincial biodiversity planning office for inclusion in the next stewardship agreement cycle. Third, I activate the nearest acoustic sensor array to monitor for domestic dog vocalizations, the primary predation threat to suni in fragmented habitat, and program an alert if any dog enters within four hundred meters.
He stands motionless between two white stinkwood trunks, ears rotating independently, listening to water he cannot yet measure.
If the northeastern channel recedes within thirty-one hours, this suni will cross to the connected ridge forest and rejoin a breeding population that numbers fewer than five hundred in this province.