“…Tayras, well adapted to running and climbing along branches [Presley, 2000], have been reported to prey upon several species of arboreal primates of similar or smaller size, including common marmosets (Callithrix jacchus), squirrel monkeys (Saimiri sciureus), and tamarins (Saguinus spp., Leontopithecus rosalia) [Galef Jr. et al, 1976;Franklin et al, 2007;Bezerra et al, 2009]. Still, the number of unsuccessful attacks we witnessed indicate that tayras may not be extremely efficient primate predators [Ferrari, 2009]. Given that the presence of a researcher apparently caused the early termination of 2 of the 3 witnessed interactions between titis and tayras, it is necessary to consider the possible impact of this factor in evaluating predation rates.…”