I am not an expert. So take my observations as my way of my learning. I tap and zoom into the picture and I can see the gold hilights on the frame on the beads. This takes a lot of patience and steady hands.
The feather texture i can see the carvings around the edge of the head. This seams like the pet bird I had. So you caught the texture pretty well.
The dark feathers on chest seem to be the hardest. I was thinking how would I capture this. I have no clue. Now that I answered my question, I zoomed out and looked at the whole scene. I seems like you captured pretty good. The shoulders do have contours and that enhances the portrait really well.
Maybe the background wood could be lightly blue washed for getting the viewer to think sky.
The black backing is the best to capture the 2 tone dark feather areas. It also captures the twisting of the white neck feathers.
I like like it.