Besides chickadees, blue jays are also common Canadian wintering birds.
Unfortunately for the chickadees, these bigger birds love to hog the feeders for themselves. Usually one is enough to chase off the rest of the little birds, but when two or more come around, there’s no way a little chickadee will dare grab some seed… unless they can flit in and out to grab a seed they can deal with on a nearby branch.
This was taken on January 14, 2016, near Barrhead, AB, Canada with my old Canon Rebel XS DSLR camera with a Canon EF 70-300 mm f/4-5.6 IS USM telephoto lens.