* Troops are usually used to describe larger groups of monkeys, especially those of the Old World (like baboons and macaques).
* Bands are often used for smaller groups of monkeys, particularly those in the New World (like howler monkeys and capuchin monkeys).
The specific term used to describe a group of monkeys can vary depending on the species and the context. However, "packs" and "mobs" are not commonly used terms for monkey groups.