Redstart Male

After much confusing research, I think I've pinned this down to a male Daurian Redstart which I spotted in Seoul along with a female (mate?). Luckily I got the pictures when I did, because they seemed to magically appear from nowhere, then didn't stick around long before being chased away, or frightened off, by a magpie (a fairly common bird here in Korea). They were both high up in the tree tops, so, yes, I'm shooting upward. They are supposedly migrating here for the winter, so, hopefully I'll see more soon.

Canon EOS 60D
Lens: Sigma DG 120-400mm 1:4.5-5.6 APO OS HSM
Focal Length: 400mm
f8
Shutter 1/1000
ISO640
Cropped ~90%

Comments and constructive criticism is greatly appreciated.