- About Groundhog Day in Canada
 - Brief history of Groundhog Day in Canada, including Great Willie of Wiarton and his successor, Wee Willie of Wiarton. - Canadian Encyclopedia: Groundhog Day
- Explains this woodchuck-driven forecasting technique observed on Groundhog Day, and critically examines the meteorological accuracy of the method.
- Project Groundhog
- Telecommunications curriculum project from the public libraries of Newfoundland and Labrador, available to students and teachers worldwide. Engages students in exploring whether or not the groundhog is an accurate weather predictor by tracking the weather in the six weeks following Groundhog Day.
- Wiarton Willie
- Official website of Wee Willie of Wiarton, with information about Groundhog Day celebrations and Canada's leading weather prognosticator. Includes photos, colouring pages, history of the event, and more.
- Wiarton Willie and Groundhog Day
- Includes reports, quick facts, and links on Wiarton Willie and Groundhog Day.
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