Abstract The locomotor behavior, of seven sympatric species of New World monkeys—Saguinus midas midas, Saimiri sciureus, Pithecia pithecia, Chiropotes satanas chiropotes, Cebus apella apella, Alouatta seniculus, and Ateles paniscus panisus—was studied at the Raleighvallen‐Voltzberg Nature Reserve in Central Surinam. This paper examines the way in which locomotor behavior is related to body size and to ecological parameters such as forest stratification, forest type, and diet. Locomotor behavior is clearly related to the size of the species; with increasing size, the amount of climbing increases and the amount of leaping decreases. In general, larger monkeys use larger arboreal supports; however, Saguinus midas midas uses relatively larger, and Ateles paniscus paniscus relatively smaller supports than expected from body size alone. Leaping is associated with use of the forest understory and with use of liane forest. Other types of locomotion are associated with main canopy use in a variety of forest types. There are no consistent associations between diet and either locomotor behavior or forest utilization; rather, monkeys with similar diets show locomotor and habitat differentiation.
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