Tamias striatus
Tiny bounding prints that vanish into a hole with no dirt mound.
Under 1 in. Miniature squirrel-style bounding groups. Four front toes, five hind. Trails along stone walls and logs. Burrow entrance is clean, no mound.
Deciduous woods, stone walls, gardens. Eastern North America.
Diurnal
Seeds, nuts, berries, insects
Cheek pouches can hold the equivalent of the chipmunk's whole head in seeds.
Should I be concerned?
Harmless.