Photographed this male House sparrow an top of bunch of branches so I played around with it. First replaced the BG with a very dark green (Nearly black) OK, but it sorta hid the tail, so I tried a medium blue BG change. Still not completely pleased with it, but will get some fresh thoughts from you nice folks.
Gus
Olympus E-3, Zuiko ED 50-200mm f2.8-3.5 SWD, @ 400 mm equiv. AP: F/5.6, 1/500s, ISO 200, -0.30eV, CWA, sRGB, AWB
Gus, out of the two I prefer the black even though it's less natural. The area around the head/beak on the blue version really shows the cut/paste whereas the black version he fits right in.
In the black version I'd tone down the white area around his lower neck - feels a tiny bit hot there. I'd also crop the left side off and go vertical since he's so tall and straight on that stick.
I like it Gus. Maybe could use a teeny more room on the right side but that's an easy fix. I like the proportions, though, and the way he's sitting in the frame.