Burrowing rodents are a type of small mammal that live underground. GOPHERS, marmots, voles, pacas, and prairie dogs are all examples of burrowing rodents. GOPHERS are small burrowing rodents with fur-lined external cheek pouches, while marmots are large ground squirrels that live in burrows. Voles are small rodents with short tails and stocky bodies, while pacas are large rodents with long tails and round ears. Prairie dogs are burrowing rodents that live in large colonies and have a complex social structure.