Need About 15 Hours of Sleep Per Day - At least that’s true of chipmunks in captivity. They are a Type of Squirrel - Weighing in at 1 to 5 ounces (28 to 142 grams), chipmunks are among the most diminutive members of the squirrel family. That means these pocket-sized rodents are also related to woodchucks and prairie dogs, which share a branch on the squirrel family tree as well...