Conga Line to the Buffet!

 I've seen a bug or two on the prickly pear cactus before, but never a Conga line like this. I believe that these are Cactus Coreid nymphs. The lighter spots on the cactus are places where they have already been feeding on this cactus pad......And you know if I see the heron, you have to see him, too---at least in the extras!