High Wire Act?
A Walking Stick insect (Phasmatodea) in an unexpected setting - meandering along the top wire of a fence.
Walking Sticks tend to be night-time feeders, and rely on their incredible natural camouflage to avoid predators during daytime hours. The camouflage isn't very effective in this case -- but I still went by this specimen twice before the "what's wrong with this picture?" reaction kicked in.
This one is in hiding posture -- the front legs are extended straight out from the body. The middle and rear legs are hooked to the wire. On closer inspection, you can see a red/orange eye at the upper left end, just in front of the forelegs.
Stick bugWalking stick insectphasmatodeaPhasmidaPhasmatoptera