Аннотация:Levels of exploratory ability were studied in four species of lower monkeys: green monkeys (Chlorocebusaethiops), cynomolgus monkeys (Macaca fascicularis), rhesus macaques (Macaca mulatta), and hamadryas baboons (Papio hamadryas). Assessments were made on the basis of indicators such as the level ofexploratory activity, the dynamics of exploratory activity, and the diversity of exploratory activities. The results obtained here indicate that these parameters had higher levels in cynomolgus monkeys and hamadryasbaboons than rhesus macaques and green monkeys.