Well, in the current default template, the dungeon walls do appear to be set to the No Flying Enemies combos, whereas the default template in older versions such as 2.10, they weren't. But wait, does the No Flying Enemies combo type even prevent Wizzrobes from appearing on those combos? Also, as far as I remember, flying enemies such as Keese never appeared in dungeon walls, regardless of whether or not the walls were set to that combo type.