: Grunts and "pig grunts" are primarily used for group coordination . They help individuals maintain contact while traveling through dense vegetation where visibility is low.
: Created by The Hollywood Edge as part of their "Animal Trax" series. Download Gorilla Grunt Series AT052801 mp3
: Mountain gorillas are particularly vocal, averaging eight vocalizations per hour, many of which are these short-range grunts. : Grunts and "pig grunts" are primarily used