Nice colors here. Yes, a more natural perch would be nice, but because this one is weathered, and angled, it helps. Well exposed.
I might be tempted to tone down the bright green on right side, just a bit, so it doesn't draw the eye away from the bird. Because the bird is small in the frame, you have to be extra careful with things that compete for your eyes attention.
If you have enough image quality to tolerate it, I might consider a vertical composition here as well.
Good advice and comments from Randy. Did you have the time to take some other frames with a better HA? This one seems to be looking slightly away, and bird images normally look stronger when they are looking slightly towards us instead.