Okapids are generally quiet animals, which suits their secretive forest lifestyle. However, they are capable of producing a surprising range of sounds when necessary. These include soft coughs, bleats, chuffs, and low-frequency calls. Mothers and calves use gentle vocalizations to communicate at close range. Most communication still relies on scent rather than sound. Vocal restraint helps avoid attracting predators.
This shows how silence can be an adaptive survival trait. Limiting noise reduces detection in dense habitats.
The okapi’s selective use of sound demonstrates behavioral efficiency. Communication only happens when absolutely necessary.
Some okapi calls are below the range of human hearing.
Smithsonian National Zoo (si.edu)