Florida Predatory Stinkbug Nymphs

It was almost sunset and this group of Pentatomid nymphs had come together to spend the night in a tight little circle - like a wagon train around a campfire. While taking pictures of them, they began to disperse somewhat but came back together when we left. There were 3 or 4 other nymphs on distant leaves heading for the group. They were about 1 cm long each, metallic blue with red on the abdomen. Family Pentatomidae.