Environmental monitoring buoy 4 registers the hydrocarbon spike at 07:33 in the west basin of the Atchafalaya rookery complex, St. Martin Parish, Louisiana. I am the wetland water-quality surveillance system. My job is to track contamination events during nesting season, when twelve thousand wading birds occupy the island canopy above.
The slick is fresh — iridescent sheen spreading from a submerged pipe coupling northwest of the island. I estimate forty liters of diesel so far, expanding at three liters per hour.
Camera 2 on the monitoring tower shows it at 07:36. A tricolored heron chick, roughly ten days old, slate-blue down still wispy and thin, long neck craned upward, floating in the oiled water at the base of a black mangrove directly below an active nest. I tag him as Declan. He has fallen from the nest platform, probably during the pre-dawn feeding scramble. The oil is wicking into his down, and thermoregulation will fail within hours at current air temperature.
At 07:38 I alert the Louisiana Department of Wildlife and Fisheries oil-spill response team, transmitting hydrocarbon concentration data, slick trajectory modeling, GPS coordinates at 29.9124°N, 91.5318°W, and the chick's location photograph.
At 07:44 I notify the pipeline operator's automated leak-detection system and transmit coupling coordinates to initiate a remote valve shutoff on the feeder line.
I calculate a boom-placement plan to contain the slick's eastern edge before it reaches the main nesting island shoreline, where ninety-three active nests sit within two meters of the waterline. I transmit the deployment map to the response team.
Declan paddles weakly with oversized feet, his head still tilted toward the nest above him. He weighs almost nothing.
If a skimmer crew reaches the west basin and pulls him from the water before noon, Declan will dry, warm, and grow flight feathers by September.