Even non-human primates have a communication system; the difference, as far as we can determine, is that non-human primates use a call system, which is a system of oral communication that uses a set o...Even non-human primates have a communication system; the difference, as far as we can determine, is that non-human primates use a call system, which is a system of oral communication that uses a set of sounds in response to environmental factors, e.g., a predator approaching.
