This is a beautiful species. I have a fair number of them in the swamp behind the house. These are nice captures. What ISO were you set at? pictures 2 and 3 have a fair amount of nosie showing on my screen.
Are you still shooting with the Markins and Sidekick? Have you tried the big Wimberley? These shots are amazing when the 700mm focal length is taken into account. Must be difficult to acquire and track fast moving subjects like these at such a distance.