Chipmunks, fattened up on acorns, are driving people nuts

There were plenty of acorns this spring, and now the chipmunks are driving people nuts. Plentiful acorns last fall meant there was still plenty of food on the ground when the chipmunks emerged from winter and got busy breeding this spring, said Shevenell Webb, a small mammal biologist with the Maine Department of Inland Fisheries and Wildlife. When their cheeks aren't bulging with nuts, chipmunks make a distinctive “chip" sound, she said.