Woodchucks (also known as groundhogs) are rarely a problem for homeowners unless they decide to turn your vegetable or flower garden into their dining room table, or take it upon themselves to dig under a deck, shed, etc. Woodchucks are the only true hibernaters we have in western Connecticut. They go into hibernation around mid-October and emerge in late February/early March. They typically give birth in late April early May with a typical litter size of four. Never get between a woodchuck and it's burrow. If there are young present you may be attacked.