Though my roosts go up to 3', I can keep my buffs divided in the orchard, and OUT of my asparagus bed, by a 2' fence. I think if I put a board on top they would fly up, but without one they don't. Somewhat like a green horse.... I think they can't judge the height without a top and bottom rail, and they stay put.My roost are 12 inches of the ground. I don't think my buffs could make a 5 ft roost. I use 4 foot wire on my pens and they never get out.
