The Toller yelps out when he’s stimulated, excited, or frustrated. Often, the sight of birds or squirrels elicits the scream. Other than that, however, they don’t tend to bark excessively.
So he screams, sheds, likes to roll in dead fish and other stinky things and is generally smarter than the average person.
The original Tollers were foxes. Canada’s Micmac Indians observed foxes performing tolling behavior on the shores of rivers and lakes, then snatching the ducks foolish enough to come too close.