Yellow-cheeked Chipmunk (Neotamias ochrogenys) lives in mountain coniferous forests across Western North America. Its conservation status is Least Concern.
Fascinating facts about the Yellow-cheeked Chipmunk
- The yellow-cheeked chipmunk is the largest species in the genus Neotamias, reaching a total length of 233 to 297 mm from nose to tail tip. Its bushy tail adds another 97 to 130 mm and is dorsoventrally flattened, giving it a distinctive silhouette. This size advantage sets it apart from all other chipmunks in the genus. The animal's overall dark, tawny olive colour with striking longitudinal stripes further highlights its unique appearance.
- The yellow-cheeked chipmunk inhabits a narrow coastal strip of northern California that never exceeds 40 km in width, forming a razor-thin ribbon of forest along the sea. Within this band it occupies humid coniferous forest up to 1 280 m altitude, where a shrubby understory provides cover and foraging ground. Its range stretches from just north of Bodega Bay and Freestone in Sonoma County to the Eel River in Humboldt County.
- When a yellow-cheeked chipmunk is spotted, it often announces its presence with a characteristic shrill double-syllable "chuck-chuck" call that is relatively low-pitched compared with other chipmunks. The call is emitted at regular intervals, making it a reliable acoustic cue for observers. Its vocalisation most closely resembles that of Townsend's chipmunk, yet remains distinct within its own habitat.
- Reproductive details for this chipmunk are scarce, but a female was once captured in March with four developing fetuses, showing that conception occurs by early spring. Males reach peak testicular size from March through June, a pattern that typically signals the height of the breeding season in rodents. Together these observations point to a primary reproductive window in the spring months, although the full cycle remains poorly documented.
- Analysis of stomach and cheek-pouch contents reveals that the chipmunk gathers a variety of plant foods, with grass seeds frequently recovered, suggesting it caches seeds for later use. In addition to seeds, it consumes fungi early in the year, oak acorns and stoneseed capsules over an extended period, and even occasional insect wings, indicating a flexible diet that spans both plant and animal matter.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
At a glance
RangeWestern North America
HabitatMountain coniferous forests
DietSeeds and nuts
About the Yellow-cheeked Chipmunk
In the sun-dappled forests of the Sierra Nevada, the yellow-cheeked chipmunk darts with reckless abandon, its tiny paws barely touching the ground as it zigzags through the underbrush with an air of joyful urgency. With a flick of its striped tail, it vanishes into the shadows, only to reappear moments later, its bright yellow cheek patches glowing like tiny beacons as it pauses to survey its surroundings with a twitching, high-strung intensity. As it scurries through its mountain domain, this diminutive rodent embodies the very essence of wildness, its irrepressible spirit woven into the fabric of the forest itself.
Hear the Yellow-cheeked Chipmunk, and 4,400+ more
Real recorded sounds, 11 nature games and a free Daily 5, 1v1 quiz duels, conservation wins and a safe Kids mode. Free on Feravox.
