Likely a springtail, species would be nice to know. Found in a group of 40 moving like a herd of close knit sheep on a holly bush close to the ground, but did not appear to be feeding on it. They displayed group awareness, flowing like water and stopping periodically. Antenna slightly larger than body size, held back at rest. Even the two that I captured still remain close at all times. Very strange behavior, as thier movement was better orchastrated than other group insects (ants, termites) But all appeared the same, no differnces in size color or caste.