Groundhog records appear across Delaware’s whole range of country, from the wooded stream valleys of White Clay Creek State Park in the Piedmont to the open farmland and marsh edges around Bombay Hook, Prime Hook, and Killens Pond farther south. That spread reflects the animal’s simple habitat needs. It wants open grassy ground next to cover, and Delaware’s mix of pasture, hedgerow, and woodland edge supplies that from one end of the state to the other.
A true hibernator with a big burrow
The groundhog is one of the few mammals in Delaware that truly hibernates, dropping its body temperature and heart rate for months rather than just dozing through the cold. It digs an extensive burrow system with multiple entrances, using separate chambers for sleeping, raising young, and a quick escape from a fox or dog. It grazes mostly on grasses and clover, and the burrow entrances themselves often mark a field edge or fence line long before the animal is ever seen.
A sharp spring ramp in the records
Reports climb fast from February through May and peak in May, then taper through the rest of the growing season before dropping to nothing in December. That ramp lines up with hibernating groundhogs waking and becoming visible again in open fields each spring, not with more groundhogs existing in Delaware at that time of year than in winter.
Status in Delaware
NatureServe ranks the groundhog S5, secure, and it’s native across the state. It’s one of the more frequently recorded mammals in this dataset, turning up in records from both Delaware’s forested north and its farmland south.
