Oh I got a laugh this evening as I watched roosting. I think I have explained before that they have to sleep in the order in which they go up the ladder and they all want to be at the far end by the wall.
Well normally if the Roadrunners happen to be up there and Maggie marches along the roost they take one look at her and fly down and come back up when she is settled.
But today Diana went upstairs before Maggie. You could see the Roadrunners thought they were safe where they were so they settled down comfortably.
I swear (I did not get video) that what Diana does is she puts her head under their fluffy butts and tips them off. No pecking, no violence but very effective nonetheless!