What Is the Difference Between a Groundhog, a Gopher and a Woodchuck?

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According to WildlifeDamageControl.net, the terms gopher, whistle pig, groundhog and woodchuck all refer to the same species, Marmota monax. Woodchucks are stocky, four-legged animals that may weigh up to 10 pounds. Woodchucks have a reputation for being troublesome pests that are hard to eradicate. They consume foods grown by farmers and gardeners, while their burrowing habits can undermine homes, decks and porches.