A New Discovery in Primate Musicality
Scientists have observed a unique and previously undocumented “musical performance” by a chimpanzee at Kyoto University in Japan. This remarkable event has provided new insights into the possible origins of music among early humans. The chimpanzee, named Ayumu, a 26-year-old male, demonstrated an unusual behavior by taking floorboards from a walkway and using them to drum while vocalizing simultaneously.
This is the first recorded instance of a chimpanzee engaging in rhythmic vocal expressions alongside drumming, according to a study published in the journal Annals of the New York Academy of Sciences. While chimpanzees have been seen drumming with sticks and other objects before, Ayumu’s behavior represents a significant breakthrough in understanding the evolution of musical expression.
Observing Ayumu’s Performances
Over nearly two years, from February 2023 to March 2025, scientists documented approximately 90 spontaneous performances by Ayumu. The chimp systematically removed floorboards from the walkway and used them as tools to create sounds.
Yuko Hattori, the study’s first author, described the experience as fascinating. She noted how Ayumu used tools to produce various sounds while also expressing himself vocally. This observation supports the theory that music, especially instrumental performance, may have originated from the externalization of emotional expression through vocalization combined with the use of tools.
The challenge of tracing ancient percussion instruments made from perishable materials like wood and animal skins has long hindered archaeological research. However, this discovery offers a crucial clue in understanding the evolution of musicality.
Understanding the Behavior
To better understand Ayumu’s actions, researchers analyzed his behavior, breaking it down into elements such as striking, dragging, and throwing. They then evaluated the connections between these actions, determining which transitions occurred randomly and which were intentional.
The team examined the intervals between strikes and compared the rhythmic stability of tool use with the rhythm of drumming performed using hands or feet. They also observed Ayumu’s facial expressions, such as the play face, which indicates positive emotions during play.
The study revealed that the sequence of sounds produced by the instruments was not random. Instead, the intervals between strikes maintained a consistent tempo, similar to a metronome. This finding suggests that the chimp’s vocal expressions were likely being externalized and developed into tool sounds.
Implications for Evolutionary Research
The research indicates that non-human primates may have the ability to externalize their emotions using instruments. Scientists emphasized the evolutionary continuity between primate acoustic displays and human musical capabilities.
This discovery opens up new avenues for understanding the roots of musicality in both humans and our primate relatives. It highlights the potential for shared cognitive and emotional traits that could have shaped the development of music over time.
By studying the behaviors of animals like Ayumu, researchers can gain deeper insights into the complex interplay between emotion, sound, and tool use. These findings contribute to a broader understanding of how music might have emerged as a form of communication and expression in early human societies.
