Marmoset Monkeys Use Personal Name Calls
Scientists discovered that marmoset monkeys use specific vocal labels, effectively names, for individual group members. This behavior was previously known only in humans, elephants, and dolphins. The study recorded “phee-call” dialogues between marmosets and found they respond more consistently to calls specifically directed at them. This finding suggests complex communication systems might be more widespread in the animal kingdom than previously thought, challenging our understanding of animal intelligence.