Pathing blocators for flying units

[Borax]

Is there any way, how to block any flying unit to move only in defined area? The flyings units ignore trees, pathing blocators and other dodads and destructibles. Or is there any pathing blocator for flying units?

 

[Razorbrain]

it you look at the Pathing Blockers in the Doodad section, there should be a Pathing Blocker (Air) that should work just fine