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Colour vision is highly variable in New World monkeys (NWMs). Evidence for the adaptive basis of colour vision in this group has… Expand The White-winged Flufftail (Sarothrura ayresi) population is listed as globally Critically Endangered. White-winged Flufftails… Expand Abstract Cacajao calvus ucayalii (Thomas, 1928) (Primates: Pitheciidae), a subspecies endemic to the Peruvian Amazon, occurs in… Expand Predation is often considered to be a prime driver in primate evolution, but, as predation is rarely observed in nature, little… Expand The white bald uakari (Cacajao calvus calvus) is among the least studied of the Amazonian primates and is found exclusively in… Expand Functional morphology may provide important information that could improve methodologies for the diagnosis of the reproductive… Expand Researchers have described multilevel societies with one-male, multifemale units (OMUs) forming within a larger group in several… Expand In the literature, particularly in primatological books, the Peruvian red uakari (Cacajao calvus ucayalii) is generally… Expand Primates living in large groups that divide to forage must have social systems compatible with this mode of living. Uakari… Expand The positional behavior and habitat use of a group of white uakaries (Cacajao calvus calvus) was observed for 6 weeks in the dry… Expand