Definitely an interesting read, and while I don't do studies like that I do believe that my Rufous Beaked know which way is out. The exo-terra I have them in opens from the top and from the front, but I've never taken them out of the top, but only the front. I'll see the two I take out quite often looking out of the front and just sitting there like they're waiting for the glass to open. I'm not saying that's the case, but it's what I've noticed. What really freaks me out is when I'm on the computer which is directly in front of the cage, just the other side, my longer one sits there and seemingly watches me. It actually kind of creeps me out, because if I go lay down or something, he basically follows me and sits there and watches. He doesn't always do this, but I'd say several times a week. I also once took one of them out and left the glass not all the way closed and I was sitting on the bed handling him and I watched my littlest one come straight from one of the holes he was peering through and went straight through the crack in the two doors. Granted I only left it open because I didn't expect any of them to come out and I was only a few feet from the tank.