Long-eared Chipmunk

Fascinating facts about the Long-eared Chipmunk

• Those ears aren't just for show — a long-eared chipmunk can swivel them independently to pinpoint the rustle of a predator in dense forest, all while facing forward. Their hearing is tuned to frequencies up to 60 kHz, well above what humans can detect, letting them hear the ultrasonic alarm calls of other rodents half a second before a hawk strikes.
• Long-eared chipmunks cache between 10,000 and 15,000 seeds and nuts each autumn across hundreds of hidden locations in the soil. Their spatial memory is so precise they recover 80% of their stash by spring — the other 20% sprout into trees, making chipmunks accidental foresters who plant thousands of conifers across Southwest mountains every year.
• In winter, a long-eared chipmunk doesn't truly hibernate like a bear. Instead they enter torpor — dropping their body temperature from 37°C to just 4°C for days at a time to conserve energy, then periodically rewarm themselves using stored fat. They wake every week to raid their seed caches, emerging briefly above the snow before retreating underground again.
• At 70 grams, a long-eared chipmunk is small enough to fit in a teacup, yet it ascends mountains to 3,500 metres — altitudes where oxygen is 40% thinner than at sea level. Their smaller lung capacity is offset by blood dense with oxygen-binding proteins, allowing them to sprint through alpine meadows where larger rodents simply cannot breathe.
• A single long-eared chipmunk produces ultrasonic vocalizations — high-pitched chirps at 22 kHz — that travel underground through soil better than they travel through air. These calls warn relatives of approaching danger in the milliseconds before a predator arrives, and the signal travels further below ground than above it, turning the forest floor into a rodent communication network.

At a glance

About the Long-eared Chipmunk

In the sun-dappled forests of the American West, the long-eared chipmunk darts with purpose, its oversized ears twitching like satellite dishes as it navigates a hidden world of seeds and secrets. With each nimble bound, it weaves a tapestry of industry and thrift, its paws barely touching the ground as it gathers and stores the treasures that will see it through the leanest of winters. As it vanishes into the underbrush, its striped back a fleeting glimpse of energy and resilience, we are reminded of the quiet, unassuming beauty that thrives in these shaded realms.

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