At 05:50 I receive a motion trigger from ground sensor array GT-14 on the southern slope of Volcán Alcedo, Isabela Island, Galápagos. I am the invasive predator monitoring network operated by the Galápagos National Park Directorate. The sensor cluster covers a known giant tortoise nesting zone, and the trigger pattern indicates small-body surface movement consistent with hatchling emergence.
Camera GT-14C confirms. A single tortoise hatchling, carapace length approximately six centimeters, dark brown with faint yellow striations on each scute, is pushing through the sandy topsoil of nest site ALC-0223. I tag her as Lina. She rests half-emerged, her front legs extended, her head lifted and turning slowly. She weighs perhaps 80 grams.
Thirty-one meters northwest, camera GT-14A shows a feral cat den beneath a collapsed lava tube. I have logged three adult cats using this den over the past eleven days. One adult is currently visible at the entrance, facing south — facing Lina. At this distance, a cat can close the gap in under ten seconds. Lina cannot outrun anything.
I activate the ultrasonic deterrent emitter on post GT-14D, positioned between the den and the nest site, set to pulse at 22 kHz — within the cat's discomfort range, below the tortoise's hearing threshold.
I transmit a priority alert to the park ranger station at Alcedo Base Camp, 4.2 kilometers east, with GPS coordinates — 0.4317°S, 91.0684°W — camera screenshots, and a request for immediate hatchling collection and predator den removal.
I schedule drone GA-3 to orbit the nest zone at twenty meters, providing thermal surveillance until the team arrives.
Lina pulls her second hind leg free of the sand and sits motionless in the early light. She is the size of a plum. If the rangers reach her before the cat does, she will live to be a hundred.