A chaparral chipmunk that mostly skips the high peaks
Merriam’s chipmunk lives in chaparral, shrubland, and the drier edges of the Great Basin desert, favoring dense low cover over open ground. It has been recorded as high as 9,600 feet, but the vast majority of sightings stay under 3,900 feet, a pattern that marks it as a foothill and mid-elevation specialist rather than a true alpine animal.
Strongly a daytime forager
Activity data for this species is about as clearly diurnal as it gets, with observations climbing sharply after sunrise, peaking through the late morning, and dropping off again by evening. That schedule lines up with a chipmunk gathering food by sight in daylight, then retreating to a burrow or rock crevice once it’s dark and owls take over.
A broad, sometimes surprising diet
Recorded food sources for Merriam’s chipmunk include coast live oak, California bay, buckbrush, and even poison oak, alongside the introduced strawberry guava. More unusual is a documented instance of it eating a Western Fence Lizard, a reminder that chipmunks are opportunistic omnivores rather than strict seed-and-nut specialists when the chance for extra protein comes along.
Vocal, common, and holding steady
Field recordings confirm Merriam’s chipmunk gives distinct calls, the kind of sharp chip or trill many western chipmunks use to warn neighbors of a hawk or a snake nearby. Records run heaviest in spring, peaking in May. The IUCN lists the species as Least Concern, and with well over 2,000 documented sightings, it’s clearly one of the more frequently recorded small mammals in its California range.
