Hi Doug, very nice catch, yellows look fine, showing detail in the plumage. Very good DOF and well exposed. It feels a little tight in the frame.
Why would you use ISO 125? You could go to ISO 400 safely on the 1d2, increasing your shutter speed and chances of a sharper image.
I like the pose, color, exposure, and sharpness of the bird, Doug. You might consider removing or darkening some of the OOF light areas in the LRC as they tend to draw my eye from the bird. I note a few sensor dust spots on the image that could easily be taken care of.