ground squirrel

Short definition from Wiktionary

Noun

1. 1
   Any of a number of medium-sized squirrel-like burrowing rodents of the tribe Marmotini (i.e., excluding the smaller chipmunks and the larger marmots and prairie dogs).
2. 2
   Any of the other squirrel-like borrowing rodents of the subfamily Marmotinae.