hole in yard 12/11/17
The hole was probably created by a pocket gopher.
Moles and gophers spend the winter underground but do not hibernate. Evidence of their burrowing activity can be seen whenever the ground isn't frozen.
Pocket gopher burrows are often capped by large mounds of soil but gophers may also create smaller "pop out" holes where they emerge briefly to feed on surrounding vegetation. The hole shown in the photo probably indicates this kind of activity. Pocket gophers plug their holes in the manner shown in the photo.
Learn more and compare here: