Vervet monkeys (Chlorocebus pygerythrus) live in noisy groups. They grunt, chatter, squeak, and scream. These noises have been studied by biologists with surprising results.
Vervets have specific alarm screams that initiate different group responses. For example, one type of scream suggests the presence of a predator like a leopard. When issued, the group responds by scurrying into the smallest branches (outermost parts) of a tree. A second type of scream suggests danger from the air (like an eagle). The group responds by either scurrying to the innermost parts of the tree or diving into a bush. A third type of scream suggests a snake. The group stands up high on their hind legs and scans the ground.
These are just three examples. Get ready for this: Vervets have at least 30 unique alarm screams.
This vervet didn’t seem too perturbed by my presence. Or maybe he was too busy enjoying a star fruit to scream.
