Well, since they fly it makes things a bit more complicated, but I have a nice display tank set up with no escapees yet! I just put a piece of screen under the lid, this part is key! Then I put the lid on, which is kind of a drop in, fish tank type of lid, so it holds the screen nicely in place, the lid is actually a fitted screen with a glass top. When all is said and done I have 3 layer of protection!