What are groundhogs' natural predators?

Coyotes, foxes, fishers, probably large raptors like hawks, eagles, and owls. Also bears. In former times wolves and cougars might have predated them as well. read more

While the groundhog may not threaten your pets, it can be in danger from other predators. Baby and adolescent groundhogs are a tasty snack for many birds of prey; coyotes, bobcats and occasionally foxes will try their hand at nabbing full-grown groundhogs for lunch. read more

Groundhog burrows usually have two to five entrances, providing groundhogs their primary means of escape from predators. Burrows are particularly large, with up to 14 metres (46 ft) of tunnels buried up to 1.5 metres (5 ft) underground, and can pose a serious threat to agricultural and residential development by damaging farm machinery and even undermining building foundations. read more

Burrows provide groundhogs with their chief means of evading enemies, because the rotund little guys (just before hibernation, a hefty woodchuck may tip the scales at 14 pounds) are too slow to escape most predators in a dead heat: the rodents have a top speed of only 8 mph, while a hungry fox may hit 25 mph. read more