 Slow lorises have a round head , a narrow snout , large eyes , and a variety of distinctive coloration patterns that are species @-@ dependent . Their arms and legs are nearly equal in length , and their trunk is long and flexible , allowing them to twist and extend to nearby branches . The hands and feet of slow lorises have several adaptations that give them a pincer @-@ like grip and enable them to grasp branches for long periods of time . Slow lorises have a toxic bite , a trait rare among mammals and unique to lorisid primates . The toxin is obtained by licking a gland on their arm , and the secretion is activated by mixing with saliva . Their toxic bite is a deterrent to predators , and the toxin is also applied to the fur during grooming as a form of protection for their infants . The secretion from the arm contains a chemical related to cat allergen , but may be augmented by secondary toxins from the diet in wild individuals . Slow lorises move slowly and deliberately , making little or no noise , and when threatened , they stop moving and remain motionless . Their only documented predators — apart from humans — include snakes , changeable hawk @-@ eagles and orangutans , although cats , civets and sun bears are suspected . Little is known about their social structure , but they are known to communicate by scent marking . Males are highly territorial . Slow lorises reproduce slowly , and the infants are initially parked on branches or carried by either parent . They are omnivores , eating small animals , fruit , tree gum , and other vegetation . 
