Predation in the wild appears to be very rare for ruffed lemurs, probably because living in the high canopy makes them challenging to catch. Evidence of predation by raptors, such as the Henst's goshawk ("Accipiter henstii") suggests it occurs at a low rate. The fossa ("Cryptoprocta ferox") could present a potential risk if it found an individual lower in the forest canopy, but no confirmation has been presented to indicate that they prey upon ruffed lemurs. Instead, only re-introduced, captive-bred ruffed lemurs have been killed by fossa, likely due to their inexperience with predators. Nesting behavior poses the biggest risk of predation, making them susceptible to carnivorous mammals, such as the ring-tailed mongoose ("Galidia elegans") and brown-tailed mongoose ("Salanoia concolor").