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Researchers say marmoset monkeys each other by name, similar to how humans each other. The 20-cm-long primates are native to South America. Scientists from the Hebrew University of Jerusalem the social interaction of 10 marmosets. The research team that the animals unique calls for other monkeys in their group. Dr David Omer, co-author of the study, said marmosets are the first non-human primates to use names. The researchers the marmosets in a variety of pairings. They then used artificial intelligence to more than 50,000 monkey calls. This the scientists to the animals had names for each other.

Dr Omer believes the findings could light on how human language . He said: "Until quite recently, people thought that human language was a singular phenomenon that out of nothing. We're to see evidence that this is not the case." Omer how marmosets a system of name calling. He said: "Marmosets live in small, monogamous family groups, and care of their young together, much like humans . These similarities that they faced comparable evolutionary social challenges to our early pre-linguistic ancestors." Other creatures known to others in their group by name are dolphins and elephants.