Two years ago (almost to the day again) my eldest son and my wife and I visited the wonderful Hawk Conservancy Trust, outside Weyhill, near Andover, Hants.
Today we did so again.
Some photos that I took today are reproduced below (all taken with a Canon 7Dmkii or a Canon 6DMki and a Canon 400mm f5.6 lens).
Please note that I've not "removed" the background in the photos of the birds with white backgrounds... the light was so bad today (or good, depending on your viewpoint... it was overcast all day anyway) that when I shot photos of birds with the grey sky in the background, I deliberately overexposed the shot to bring out the detail in the subject (the bird) and also blow out the background (make it very light).
The result is a load of "clean" images, which I'm afraid either are your thing (in many cases they are my thing) or they're not.