I live in Parksville on Vancouver Island in BC. I have seen two Barred owls over the past several months in two different locations and a nesting Great Horned owls with chicks.
In the late 1970's I lived in Churchill Falls, Labrador and was fortunate to have seen several Snowy owls. On one occasion I shot a Ptarmigan, that was about 50 meters away. Before I could walk through the deep snow to retrieve the Ptarmigan, a Snowy owl swooped down and attempted to grab the dead bird. Fortunately, I was able to recover the Ptarmigan which contained lead shotgun pellets - not a good diet for owls.