08/31/2026
Eastern chipmunks are ground squirrels, and they are one of four ground squirrels found in Illinois, along with 13-lined ground squirrels, Franklin’s ground squirrels and woodchucks. They are the smallest of the four, measuring 8 inches to 12 inches long and weighing just 2 ounces to 5 ounces.
Chipmunks live across Illinois, preferring the edges of woodland areas. But don’t be surprised to see them in your yard because they thrive in urban areas as well. They are most active during the day, and they generally live solitary lives although they sometimes live in close proximity to other chipmunks.
They are omnivores. Their diet primarily consists of seeds, nuts, fungi and flowers, but they will eat insects, spiders and other invertebrates in the summer.
Fun fact: They can store a lot of food in their chubby cheeks. Their expandable cheek pouches can extend to hold as many as 12 acorns, 31 kernels of corn or 70 sunflower seeds!
(Photos courtesy of Jen Radwan)