All lorises have extremely strong fingers and toes, and they are capable of maintaining a powerful grip with either hands or feet for astonishingly long periods of time. They are arboreal and nocturnal, sleeping by day in hollowed out trees, tree crevices or branches. Generally they sleep curled up in a ball, with their heads tucked up under their arms. When they move, they do so with slow deliberate hand-over-hand movements, moving along as easily under a branch as above. They are capable of moving quickly if alarmed, but they do not jump or leap.
Worldwide, there are over 175 pygmy slow lorises in captivity at recognized captive breeding facilities. In North America, the 75 captive pygmy slow lorises are managed by a Species Survival Plan (SSP). Due to deforestation in their native Vietnam, pygmy slows are considered endangered. The DLC currently has three breeding pairs of pygmies.