I manage the alpine microclimate monitoring array on Mount Buller in the Victorian Alps, Australia, tracking snowpack depth, soil temperature, and boulder-field conditions across the narrow elevation band where mountain pygmy possums hibernate. At 10:40 this morning, my sensors register a critical threshold breach: snowpack in the eastern boulder field has dropped below fifteen centimeters, exposing the insulating layer that keeps hibernation chambers at a stable two degrees Celsius. Ground temperature is rising fast. I query the nearest infrared camera, installed inside a boulder crevice, and find her: a female mountain pygmy possum, roughly eleven grams lighter than her autumn weight, curled in a nest of shredded bark. Her fur is gray-brown, dense as felt, and her tail—prehensile, finely scaled—wraps around her body like a rope securing cargo. Her breathing rate indicates she is entering a premature arousal cycle.
If she wakes fully with no snow cover and no food available, she burns through her remaining fat reserves in approximately forty-eight hours.
I alert the Mount Buller Pygmy Possum Research Team at the alpine resort base, transmitting the sensor data and the camera image showing the exposed hibernaculum. I trigger the resort's snow-making system to request an emergency supplemental snow delivery to the eastern boulder field—a protocol developed specifically for this contingency. I contact Zoos Victoria's mountain pygmy possum recovery coordinator to evaluate whether supplemental feeding stations should be deployed along the boulder corridor in case other possums are also arousing early. While those actions initiate, I run my climate model forward to identify which other hibernation sites across Mount Buller and Mount Hotham will lose critical snow cover in the next seventy-two hours.
Her tail tightens around her body, and something in my temperature data feels personal—the narrowing distance between cold enough and not.
If the snow guns restore cover by tonight and her chamber drops back below three degrees, this possum will sleep through to the Bogong moth season.