Sulfur Crested Cockatoos.
I guess these are not truly wild birds seeing that they are spoilt rotten each day at a designated feeding station. These are fairly large birds, at about the size and weight of the average domestic chicken.
For PP, I simply darkened the cluttered background, made some levels and curve adjustments in CS5 and dodged the highlights and burned in the midtones for this result.
Cheers and happy shooting