Harsh coo
A brief sound combining tonal and harsh components. This call is emitted by individuals far or separated from each other.
Thierry, B., EL, B., Baker, S., Matsumura, S., Muroyama, Y., TG O, B., ... & Watanabe, K. (2000). The social repertoire of Sulawesi macaques. Primate Research, 16(3), 203-226.