Wonderful to have beautiful birds like this just land and ask to be photographed!
The Auto White Balance in many cameras, and definitely with Canon, have a tendency to show a 'cool' or blue tint for images shot in the shade or cloudy conditions, and require adjustment in post processing.
Also, be careful to avoid blowing highlights of white feathers in bright direct sun, which is quite easy to do. Looking at your images, I suspect there is more detail contained there (except for possibly in the final shot), and with some adjustment of tonality, use of the Shadows and Highlights tool, must of that detail may be reclaimed.