Chipmunk (Tamias striatus and relatives)

MammalRodentNorth America

Overview

Chipmunks are small, striped ground squirrels of the family Sciuridae. They are immediately recognisable from the dark and pale stripes running along the back and, in most species, across the face — a pattern that separates them from other small squirrels.

Almost all chipmunks live in North America. The single exception is the Siberian chipmunk of northern Asia. The eastern chipmunk (Tamias striatus) of eastern North America is used here as a familiar reference species; the many western species belong to the genus Neotamias.

The chipmunk's defining tool is a pair of expandable cheek pouches. These let the animal carry a surprising volume of seeds and nuts back to a burrow in a single trip, which is central to how it survives winter.

Habitat & Range

Chipmunks occupy deciduous and mixed woodland, forest edges, rocky slopes, hedgerows and suburban gardens. They are ground animals that climb readily but nest below ground, excavating burrow systems with sleeping chambers, storage chambers and multiple entrances that are usually kept inconspicuous.

Diet

Chipmunks are omnivorous with a strong seed and nut bias: acorns, beech mast, hazelnuts, conifer seeds, berries, fungi, and green plant material, along with insects, worms, and occasionally eggs or small animals. Rather than fattening heavily for winter, chipmunks hoard — carrying food in their cheek pouches and building large caches underground.

Behavior

Chipmunks are mainly solitary and defend a territory around the burrow. They are diurnal and highly alert, giving sharp repeated 'chip' calls and lower 'chuck' notes that function as alarm signals. In winter they retreat underground and enter torpor, but unlike a true deep hibernator they rouse periodically to feed from stored caches. Because many buried seeds are never retrieved, chipmunks act as seed dispersers for trees.

Human Interaction & Conservation

Chipmunks are common and familiar around gardens, parks and campsites, where they may become bold near people. They are wild rodents rather than pets, and this profile offers no keeping, handling or wildlife-control guidance; questions about chipmunks in or around buildings are best raised with local wildlife authorities. Their seed-caching helps regenerate woodland.