#callithrix

Dynamic vocal learning in adult marmoset monkeys

Monkeys that bond together, sound together.

A new study shows that newly bonded common marmoset (Callithrix jacchus) pairs quickly adjust their calls to match each other, with both partners changing in sync. This vocal alignment is strongest when they initially sound different. Behind this is a dynamic feedback loop, with each monkey constantly adjusting to its partner’s calls. This vocal 'coupling' may signal relationships to others and reveals how simple social interactions can shape communication and hint at the evolutionary origins of primate vocal learning and the precursors of human language.

Read the article in Proceedings B:

Wied's Black-tufted-ear Marmoset Callithrix kuhlii

Found in tropical forests of eastern Brazil. It lives in groups consisting of 4 or 5 females and 2 or 3 males (plus children). They are matriarchal, and only the dominant female is allowed to mate. Like other marmosets, the offspring are always born in pairs.

A common marmoset (Callithrix jacchus) in Yorkshire Wildlife Park, UK

Black-tufted-ear Marmoset (Callithrix penicillata), family Callitrichidae, Sao Paolo, Brazil