Just came across this.
https://www.eurekalert.org/news-releases/1055624
NEWS RELEASE 29-AUG-2024
New study from Hebrew University reveals
that marmoset monkeys use specific calls,
known as "phee-calls," to name each other,
a behavior previously known to exist only
in humans, dolphins, and elephants. This
discovery highlights the complexity of
social communication in marmosets and
suggests that their ability to vocally
label each other may provide valuable
insights into the evolution of human
language.
Article is not public. Considering tracking it
down later
https://www.science.org/doi/10.1126/science.adp3757
29 Aug 2024
Vocal labeling of others by nonhuman primates
Abstract
Humans, dolphins, and elephants are the only
known species that vocally label their
conspecifics. It remains unclear whether
nonhuman primates share this ability. We
recorded spontaneous “phee-call” dialogues
between pairs of marmoset monkeys. We
discovered that marmosets use these calls to
vocally label their conspecifics. Moreover,
they respond more consistently and correctly
to calls that are specifically directed at
them. Analysis of calls from multiple monkeys
revealed that family members use similar
calls and acoustic features to label others
and perform vocal learning. These findings
shed light on the complexities of social
vocalizations among nonhuman primates and
suggest that marmoset vocalizations may
provide a model for understanding aspects
of human language, thereby offering new
insights into the evolution of social
communication.
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