Collared Redstart it is. Lovely little bird, nicely captured with a nice simple BG. Good perch too, although I might be tempted to crop up a bit from the bottom and add some at top, to reduce the heaviness of the stump.
Image does look a tad dark ,smashing little bird and very different to the Redstarts we have in the UK,do like the pose and the nice clean bg,very well captured.