I photographed all these images utilizing my Nikon D500, and my Tamron 18-400 mm set at 400 mm, F/8, ISO 500, 1/1600 sec, and handheld. I had my focus point set on the bird, however, when the hawk took off and had its wings extended I did clip the ends of the wings. I should have zoomed out when I realized that the flight was coming. All the pictures are full frame.
Watching the red-tailed closely I could tell that it was getting ready to fly and captured the sequence. Just remember to leave enough room at the zoom end of your lens so you will not cut off wingtips. Artie Morris has information on how you can repair cut off wingtips.