This true lemur has not been studied intensively in the wild, but it is known to be fairly social. Group sizes vary from four to eleven individuals on average. Females are dominant as in most lemur species, and there are usually more males than females in each social group. The blue-eyed black lemur is thought to be polygynous. Females give birth to one or two offspring in June or July, after a gestation of 120 to 129 days. The young are weaned after about 5–6 months, and reach maturity at about 2 years of age. It may live between 15–30 years in captivity, with little data recorded on their longevity in the wild. It demonstrates a cathemeral activity pattern, being awake sporadically throughout the day. The occasional nighttime activities are thought to be based on the intensity of the moonlight.