Vocal complexity in the long calls of Bornean orangutans

https://peerj.com/articles/17320/

This research investigates the vocal complexity of long calls in Bornean orangutans, analyzing various features such as duration, pitch, and frequency modulation. The study finds that these vocalizations exhibit significant individual variation and context-specific usage, suggesting that long calls may serve important social functions. The findings contribute to understanding the evolution of communication in primates and the potential cognitive capabilities of orangutans.

PeerJ