In the middle of the dry season they could even eat some food very poor in nutrients, like bark. Changes were observed between sexes and among females in their different stages. During the rainy season the feeding activity of females with babies increases while that of males decreases. No particular changes were observed in the feeding behaviour of females without offspring in the 2 different seasons. Monthly variability in the diet of P. v. verreauxi and between the two groups of females, with and without babies, were observed.
Chemical analyses of the plants eaten by sifakas are in progress.