Mostly lizards I presume? I remember reading somewhere several years ago that there were only (I think) two snake species at the zoo due to the strict regulations on the island. And, of course, none anywhere else in Hawaii. Makes sense if so, to prevent the disaster that befell Guam with the brown snake invasion.
I like the idea of having barriers to keep people a little way off from the windows. Reptile house crowding is one of my least favourite things. I hate it when there are so many people that you have to move through a building as one big group and only get a quick look into an exhibit before the people behind you are trying to move on.
Thanks for posting the link. Oddly, quite a few animals listed under "other species not at the zoo" are also mentioned above under "Animal Species At The Zoo".