Chimpanzees develop regional vocal dialects, study finds

A new study published in the journal PLOS One suggests that chimpanzees may develop distinct vocal dialects, challenging the long-held assumption that their calls are fixed by genetics alone.

Researchers analyzed over 11,000 vocalizations from 30 young chimpanzees at two geographically separated locations: Chimfunshi Wildlife Orphanage in Zambia and Gombe National Park in Tanzania. The findings indicate that infant chimpanzees already produce grunts and laughs with location-specific signatures. As the animals transition from infancy to their juvenile years, these vocal differences become more pronounced across all call types.

According to lead researcher Kassandra Giragosian of Queen Mary University of London, the results show that chimpanzee vocalizations continue to develop as young animals interact with their social and ecological environments. The study noted that whimpers, laughs, and grunts were highly accurate in identifying the home site of the chimpanzees, with accuracy rates between 90% and 98%. This developmental pattern mirrors human speech acquisition, where regional accents sharpen as children grow, providing new insights into the evolutionary roots of vocal flexibility.