Up here in Alaska they're called Marmots or Parka squirrels, don't know if they're the same critters, but they'll blow a stalk for you. I don't know how many times I've put the perfect sneak on a Dall Sheep or Bear, only to have a "whistle pig" spoil the game..., can't live with 'em, wouldn't be near as much fun without 'em...
>>>===> Dave
P.S. They're called "whistle pigs" because of their shrill warning whistle just before they dive into their hole.