Normally you need a telephoto to make fencing "disappear," but this was taken with a wide angle lens. That shows how effective their proprietary Invisinet fencing is. It is connected to the two tall dead cacti, which form the corners of the exhibit. If you look at the sky next to the left cactus, you can see the fencing.
One of the great zoo exhibits and a seamless slice of the desert that is officially a coyote enclosure. I never get tired of seeing photos of this habitat.
