MINOT, N.D. (AP) — The Richardson’s ground squirrel weighs less than a pound, is about a foot long and is native to the northern Plains. The little creature also is a ferocious tunneler, and it’s exasperating the people of Minot, North Dakota, where it’s burrowing everywhere from vacant lots to the middle of town, and growing more plentiful over the past two decades. Now North Dakota’s fourth-largest city is fighting back, but even the pest control guy leading the charge acknowledges that it