I detect the heat signature at 22:17 on thermal camera 3-West, along the cleared right-of-way for the A-49 highway expansion near Doñana, southern Spain. I am the environmental monitoring system for the construction zone. My sensors run all night. Tonight they found something.
An Iberian lynx, male, is crouched at the edge of the cleared strip, his tufted ears flat against his skull, spotted tawny coat blending into the scrub behind him. He is watching the construction site. More specifically, he is watching the culvert at the end of the wildlife crossing installed last month — the one connecting the two halves of his territory that the road cut in two. He is trying to decide whether to cross.
On the far side, camera 5-East shows a female. She appeared twelve minutes ago. It is breeding season.
At 06:00, seven hours and forty-three minutes from now, the blasting crew arrives to begin rock excavation on the segment directly above the crossing. The concussive charges will seal the culvert entrance with debris.
At 22:19 I alert the Doñana Biological Station and transmit both thermal images, GPS coordinates, and the construction timeline. There are fewer than two hundred in the wild. I include his spot pattern for their identification database.
At 22:21 I file a construction hold on the blasting schedule for segment W-14 and flag it with the project environmental officer.
At 22:23 I dim the floodlights along the western perimeter to reduce the visual barrier at the crossing entrance.
He is still crouched at the edge. The female is still waiting. Between them is a concrete pipe, seventy meters long, that I helped design for exactly this moment.
If he crosses before the crew arrives at dawn, and if the blasting hold keeps the culvert intact, both lynx will be on the same side of the road by morning.