The four-legged weather forecasters aren't on the same footing when it comes to whether we'll see an early spring.

In Canada, two high-profile Groundhog Day prognosticators, Nova Scotia's Shubenacadie Sam and Alberta's Balzac Billy, are calling for an early spring, but Ontario's Wiarton Willie expects six more weeks of winter.

According to tradition, if the groundhog doesn't see its shadow when it emerges from its burrow on Groundhog Day, an early spring is in store.

Groundhogs agree, an early spring it shall be3:42

South of the border, Pennsylvania's Punxsutawney Phil, arguably the best-known weather predicting woodchuck, also predicted an early end to winter.

This year's Groundhog Day festivities in Manitoba have been cancelled following Friday night's death of Winnipeg Willow, according to the Prairie Wildlife Rehabilitation Centre.

Forecasts aside, here are five things to know about Groundhog Day:

Rodent reliability highly suspect

Like some human weather forecasters, groundhogs don't have a great track record for accuracy. A Canadian study looked at Groundhog Day predictions from the past 30 years and found they were right only about 37 per cent of the time.

Looking for love

When groundhogs peek their heads out on Feb. 2, it may have nothing to do with the weather and everything to do with looking for love.

"At this time of year, males emerge from their burrows to start searching for the females," Stam Zervanos, a biology professor at Penn State Berks, in Reading, Pa., told the National Geographic in an interview last year.

"The females come out probably seven days later and stay just outside of their burrow or maybe just inside their burrow." he said.

Medieval origins in Europe

Groundhog Day is not a North American invention.

It's believed the holiday originated in medieval Europe, rooted in the Christian festival of Candlemas, and that hedgehogs were the soothsaying rodent of choice.

Wiarton Willie dynasty

The original Willie, an albino groundhog, was in action for 22 years, and died just two days before Groundhog Day 1999. An unknown number of successors have also been known as Willie. Tuesday's event is Wiarton's 60th annual Groundhog Day.

Whistle-pigs?

Groundhogs are known by many other names, according to National Geographic, including land beavers, woodchucks and whistle-pigs, for their tendency to emit short, high-pitched whistles.