Although I'm only seeing a few birds, the Red Squirrel that lives under our shed keeps me amused. It usually emerges once or twice a day to race back and forth up and down the tree trunks and through the tree branches. The Red Squirrel, Tamiasciurus hudsonicus, doesn't hibernate, so it's active all winter, though it may hide away in a warm nest eating its winter cache of food or sleeping a lot of the time.
The peak of our shed is one of its favourite perches, I presume watching out for predators. It will sit here for a full minute or two.