While I still have exhibit design fresh in my mind, I think Zoo360 style "overhead trails" are a genius idea for zoos to give more space for their animals, but they shouldn't be there *just for being there*. Philadelphia's justification for inventing Zoo360 was ingenious, in the sense that the animals that they had in previously static exhibits could explore beyond their initial territory, and they have the choice to explore and rotate. (And I feel that this concept can work for certain species that Philadelphia used to have, but I've ranted and raved about it for long enough, IYKYK.) Saint Louis' Primate Canopy Trails is a genius way of having spacious outdoor habitats for all of their species, without having to phase any one of them out to make space for a remaining species. If it's for the sake of maintaining a collection and maximizing the amount of space available for any amount of species, then overhead trails and rotational exhibits make the most amount of sense. Even something like Zoo Knoxville's Gibbon Trails and Langur Landing has overhead trails, but as that exhibit is on a hill, the designers wanted to take advantage of the opportunity to showcase the aerial prowess of silvery lutungs and white-handed gibbons. That said, I do feel there is a monotony in the way these overhead trails are designed, like it's the same oval support frames, the same galvanized metal flooring, the same "hoops" and the same mesh trail strung on a steel cable. I do get that for recent Zoo360-style exhibits, that's because it's all the same firm, CLR Design, doing those trails. But there should be some level of innovation that would break the norm. Houston's overhead passage for their jaguar breaks the norm by having a replicated ceiba tree that just so happens to have the mesh lie in a perfect way so Tesoro doesn't escape. It's this kind of innovation that needs to be prevalent in exhibit design, if increasingly dime-a-dozen ideas like overhead trails are going to be utilized in zoos across the country and even across the world. Imitation is the sincerest form of flattery, but overexposure leads to a want for novelty.