The Ontogeny of the Great Call in Female Southern Yellow-Cheeked Gibbons (Nomascus gabriellae)

Abstract The study of vocal development in non-human primates is crucial to understanding developmental trajectories and distinguishing innate from acquired vocal traits. Recent studies show that young female gibbons co-sing with their mothers, but these interactions decline as females become more independent. We studied the development of the great call, including notes and twitter sounds, in five captive female southern yellow-cheeked gibbons ( Nomascus gabriellae ) from 7 months to 7 years 11