Yep lots of them in East Central Alberta, I think they recognize gun shots, as I've seen them circling the range, either that or we all just smell like carrion! They nest around this area, you can tell the young ones as they have white/grey heads instead of red.
Also another way to tell them when flying, is they look to have a silver edge on the back of their wings. I think it is just the way the daylight comes through the wing feathers, but it is fairly noticeable when they are flying on a sunny day.