Army ants are surely understood for their aggression, especially as predators. They make colonies that move starting with one place then onto the next. Army ants always move during the daytime, going after little vertebrates. Really, the entire settlement set up together can eat 500,000 prey creatures every day.
While puss caterpillars look furry and cute, do not be fooled. Their fur hides spines that can cause a very painful reaction upon contact with skin and sometime difficulty breathing, numbness and chest pain.