Plate Nº 63 · recorded October 10, 2026
Biology & EvolutionReported finding
Elephants synchronize rumbles during group decisions, study finds
A 36-year study of 902 recordings from 84 wild elephants in Kenya found their low-frequency rumbles grow acoustically similar as groups coordinate their next move.
By Priya Raman2 min read487 words
In brief
- Researchers analyzed 902 rumble recordings from 84 elephants across 39 family groups in Amboseli National Park, Kenya.
- Recordings were collected during several sampling periods between 1986 and 2022.
- Around 60% of African savanna elephant rumbles occur in overlapping choruses.
- Six social call types were identified, including Contact, Let's-Go, Cadenced, Coo, Little-Greeting, and Greeting rumbles.
- The study was published in Scientific Reports in 2026.
African savanna elephants gradually synchronize their low-frequency rumbles when deciding what to do as a group, according to a study of 902 recordings collected over 36 years in Kenya. The work appears in Scientific Reports.
How do elephants talk to each other?
African savanna elephants (Loxodonta africana) live in tight family groups and keep in touch using low-frequency rumbles, some of which slip below the range of human hearing. Around 60% of these calls occur in "choruses," where two or more elephants vocalize at the same time. Such overlapping calls are difficult to analyze — a challenge scientists call the "cocktail party problem," after the human difficulty of following one conversation in a noisy room.
What did the researchers measure?
Sara Keen and colleagues analyzed 902 recordings of single and chorused rumbles from 84 elephants in 39 family groups in Amboseli National Park. The recordings span several sampling periods between 1986 and 2022. To handle the overlapping calls, the team used machine learning, training models to "listen" to an entire chorus at once rather than separating individual voices.
The team sorted calls into six social categories:
- Contact: rumbles between separated elephants trying to reconnect
- Let's-Go: rumbles that prompt the group to move
- Cadenced: rumbles during feeding, resting, or slow travel that may precede a switch in activity
- Coo: calls from females to calves
- Little-Greeting: brief greetings between closely bonded elephants
- Greeting: longer vocalizations when elephants reunite
What did they find?
The acoustic signature of a rumble reliably revealed its social context, whether the call came from a single elephant or from a chorus. Models trained on solo calls also classified chorused calls correctly, suggesting both forms share context-specific acoustic features, including which frequencies carry the most energy.
The key discovery is temporal. As Cadenced, Contact, and Greeting exchanges progressed, the rumbles of different callers grew more acoustically similar. Cadenced and Contact exchanges often require multiple elephants to align on a shared plan of action, so the team proposes that vocal convergence functions as a group decision signal.
What are the limits of this study?
The authors caution that the research did not include playback experiments — tests in which elephants hear recorded calls and researchers watch their responses. Without such tests, the study cannot prove that elephants perceive converging calls as a coordination cue or change their behavior in response.
Why does this matter?
If converging rumbles do help elephants make collective decisions, the finding adds a new layer to how scientists understand elephant social cognition. Around 60% of their rumbles occur in choruses, making these overlapping vocalizations a major communication channel. Viewing chorus structure as encoding both "what is happening" and "what we are about to do together" reframes elephant choruses not as background noise but as active group signals.
The study is published as Louis Mahon et al, "Social context information and acoustic convergence in elephant vocal choruses," Scientific Reports (2026).
via Phys.org Biology (Source)
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Senior reporter covering industry trends and analytics at SciBeat.
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