Do your Katydids especially love cactus, or do they just end up there because you grow so many different ones? You had a great photo of another Katydid on a prickly perch some time ago if I remember right...(Not criticizing -- just wondering why they like cactus so much!)___________________________It's not work, it's gardening!.
Alan, I've asked myself the same question. Maybe they like an exposed perch for some reason? They certainly don't eat cacti. We probably have many more catytids that are hard to spot when hidden among the foliage of other plants.
Stunning photo Gerhard!
What an awesome shot!