Woodchucks/Groundhogs are part of the rodent family!  These critters do not actually chuck wood but are able to move rocks and other large objects up to and sometimes larger than themselves when excavating an area.  When Woodchucks are looking to make a home they will burrow into the grassland areas or rocky areas that are protected just below frost level with two chambers that usually go 5-6 feet in each direction.  One strictly being the latrine and other other being the sleeping chamber.  Woodchucks tend to be mostly active in the early morning and early evening to forage on vegetation, when the sun isn’t strong.