What can I do to keep an egret away?

I have a pond and a pair of geese. I build a float for them to go on at night to stay safe from predators. They have been using up until recently. Everyday in the twilight hour, which is when coyotes are most active, an egret comes and sits on the island. Obviously the egret is much bigger and the geese are afraid of him. I don’t want the hurt the egret but I’d like him to leave so they geese can have the float back. Is there anything I could do to keep him away?