[5] Laboratory experiments indicated lower levels of activity even in lighting conditions consistent with a full moon.

[2] It lives in small groups of between two and six monkeys, most typically two to four, consisting of an adult pair and one infant and several juveniles and/or subadults.

[2] The latter figure occurred in a forest remnant that had served as a refuge, which may account for the extremely high density.

[4] The monogamous pair generally gives birth to a single infant each year, although twins occasionally occur.

[4] The gray-handed night monkey is listed as "vulnerable" by the International Union for Conservation of Nature (IUCN).