Serendipidy, it's hard to imagine a more detailed BCNH - WOW.
FWIW the last two shots I posted are American Redstart female.
Thanks, Jack. I know almost nothing about identifying N. Am. birds, but I spent 15 minutes Googling grey and yellow birds of Alberta after I read your post. The best I could match was the American Redstart or some type of warbler. I thought there was too much red in the Redstart (I didn't think about a female though), so I didn't hazard a guess.