Researchers have discovered that marmoset monkeys use distinctive "phee calls" to individually address each other, effectively using names in their social interactions.
Naming individuals requires sophisticated cognitive abilities, which marmosets demonstrate by distinguishing between individuals and conjuring representations of them in their minds.
This discovery will shape future research to explore the brain circuits in marmosets that enable them to use these complex vocalizations as names.
Marmosets are known for their vocal diversity, employing various calls including chirps and trills, specific to their social communications and environmental contexts.
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