Groundhogs – A Sure Sign of Spring

Groundhogs – A Sure Sign of Spring

Groundhog (Photo: Marie Stadnek, CWF Photo Club Member)
Groundhog (Photo: Marie Stadnek, CWF Photo Club Member)

By Terri-Lee Reid

Regardless of whether Wiarton Willie, Punxsutawney Phil, Brandon Bob, Balzac Billy, Shubenacadie Sam or Gary the Groundhog saw his shadow on Groundhog Day, the first groundhog I see after a long winter is a sure sign of spring.

Also called woodchucks and whistle-pigs, groundhogs are rodents that are found in southern Canada, even through southern Yukon and Northwest Territories. Stocky in appearance, groundhogs weigh on average between two and four kilograms (4.4 and 8.8 pounds) and measure between 40 and 65 centimetres (15.7 and 25.5 inches) in length, which includes their 15-centimetre (5.9-inch) bushy tail. Excellent burrowers, groundhogs are equipped with strong legs and claws. They are usually basic brown, but they can also be yellowish to reddish brown.

Mating occurs once groundhogs emerge from hibernation, and after a period of about 30 days an average of four young are born, typically in May. Females have just one litter a year. Born blind, helpless and weighing only about 30 grams, they are weaned and eating nutritious plants within six short weeks.

Primarily herbivores, groundhogs enjoy munching on fresh green plants, including grasses and forbs, clover, alfalfa and garden vegetables. Very rarely they have been observed feeding on insects, snails and even young birds.

Their burrows are quite elaborate, with a main entrance, at least one “spyhole,” a nesting area and a separate toilet chamber. Groundhogs are known to keep their burrows clean by lining the bottom with dry grass.

Groundhogs are true hibernators; they enter hibernation in either late September or October and don’t emerge until March. While hibernating, groundhogs reduce their heartbeat from approximately 80 to five beats per minute and can reduce their body temperature to as low as 3°C.

Groundhogs spend a lot of time eating and warming themselves in the sun. They are able to climb trees, though they prefer spending their time on the ground. They typically don’t stray too far from their burrow, making sure they can scurry to safety in the event of an oncoming predator such as a red fox, coyote or dog.

Groundhogs are known to be quite vocal, which is where their other common name, whistle-pig, comes from. Their range of noises includes a loud whistle, when they are alarmed, a squeal, when they are fighting or injured, and tooth grinding, when they are cornered. They are also known to bark, but their reason for making this sound is unknown.

Groundhogs can live in the wild for up to six years. The burrows they create and eventually abandon become shelters for numerous species, including foxes, rabbits, skunks, raccoons and snakes. Groundhogs are also important prey for animals such as bobcats, bears and wolves.

Groundhogs can wreak havoc in gardens as they munch away on scrumptious flowers and vegetables. There are actions you can take, however, to save your beautiful garden. Try sprinkling some scent and taste deterrents, such as lemon juice, talcum powder (mixed with water), garlic powder, onion powder and dog hair in nylon stockings on sticks in and around your garden. The more of these you use and the more frequently you apply them, the sooner the groundhog will learn that visiting your garden is not a very safe or tasteful experience!

As groundhogs help to keep your weeds in balance, make sure you don’t use any herbicides and provide rocks in safe, sunny areas near their burrows where they can sun themselves when they’re not eating.

Hopefully this spring your garden won’t act as a smorgasbord for these stocky rodents, and you can enjoy their antics as they soak up the sun in your backyard!


This content is from Hinterland Who’s Who, a joint program between the Canadian Wildlife Federation and Environment Canada. For more species fact sheets, videos and sound clips, please visit