Social Behavior
A diademed sifaka rests while his golden-crowned sifaka companion stretches. Click image for larger version.
The diademed sifaka is active during the day, like all the sifakas, but unlike crepuscular Eulemur species, these sifakas will ascend into a sleep tree for the night as early as a full hour before sunset. They live in multi-male/multi-female groups numbering from four to eight animals. Females live in one group their entire lives, while males migrate between groups, especially during the breeding season. Males might be quite fluid in their group affiliation. Groups of diademed sifaka occupy home ranges of about 35 hectares in size.