This study was the result of a truly laboratory-driven effort that started over speculation on a Friday at the campus pub and has led to a cumulative effort of students in the Community Ecology and Energetics Laboratory at Lakehead University over several years. Brendan Allan, Patrick Kennedy, Victoria Langen, Andrew Milling, and Stephen Slongo assisted with early components of compiling information for the paper. Thanks are given to all of the municipal, state, and provincial organizations that keep records of groundhog “predictions” that can be tracked and occasionally examined. We thank the constructive suggestions from three anonymous reviewers that were helpful in improving the paper. This work was supported by grants from the Canada Research Chair program, an NSERC Discovery grant and an Ontario Early Career Award to author Rennie, and an NSERC PGS-D grant to author Ross.
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