Here's a breakdown of the origin:
* "Whistle": Refers to the sound the woodchuck makes.
* "Pig": This part is a bit more ambiguous. It could be due to the animal's stout, pig-like build, or perhaps its burrowing habits which resemble those of wild boars.
The term "whistle pig" has been used for centuries, with its earliest recorded use dating back to the 1700s. It's considered a colloquial name and is often used interchangeably with "groundhog" in some regions.