Sorry for the very poor picture quality. The id of this bird eludes me completely. Picture was taken 7 years ago east of Jasper Alberta, July 18th. Could be a juvenile. I just can't put the whitish head stripe and the rusty breast/throat on any one kind of bird.
Based on Sibley it looks like a male, perhaps a young one moulting into adult plumage (almost there?). A female or real young one would have much less distinct head markings.
Thank you, Dan and John! I was thrown off by the colour of the head marking. According to Sibley's it is quite orange which doesn't really show like that in the picture.