[capableweb]

Does groundhogs not exists outside of North America (or more specifically, Canada and the US) or is the data just harder to gather?

[Freak_NL]

Not naturally no, according to Wikipedia. Plenty of other marmots though (like Murmeltiere in the European Alps), although I don't think those can predict the seasons.

[pcraig3]

Nobody else seems to do this outside of the US and Canada.