Thirteen-lined ground squirrel records in Montana concentrate in the far northeast, where Sheridan County holds 15 of the state’s 32 and Brush Lake State Park is the most reported single place, short-grass prairie and pasture country this ground squirrel favors over forest or dense shrub.
Reports build through spring and peak at 11 in August, with a smaller rise in June, before dropping to nearly nothing by fall, tracking this ground squirrel’s active season above ground before it retreats underground for a long winter hibernation. NatureServe ranks the species S5, Secure, statewide.
Full species profile
