From a falconers point of view rather than a 'togs,
Hopefully if there is a breeze the falconer will fly hawks ( short wings / broad wings) into the wind.
This will slow them down a little and give you a chance to ( auto) focus. The long wings, commonly called
(incorrectly, btw, falcons) will probabley be stooped to the lure, they ( the birds)
will climb to a hundred or so feet and will usually come out of the sun ( if there is any) at the lure, at anything upto 100 Mph 40-60mph is more likely.
They may well loose height very quickly ( tear-drop stoop) then hedge hop or gound hug to snatch the lure on the rise.
Now I have no idea as to the species that will be flown or the type of display you are likley to see,
the above is just a little on the behaviour you might well see at a "half decent" display.
HTH :shrug: