Formed by the procumbent lower incisor and canine, the toothcomb projects past the front margin of the mouth.

P. verreauxi also presents the high, shearing molar crests of a folivore, helping to shread the leaves, fruit and flowers that it eats.

Like other indriids, P. verreauxi has a short calcaneus, pointed nails, and slightly webbed hands and feet.

[7] Verreaux's sifakas forage for food with their troop, primarily in the morning and late afternoon, so they can rest during the hottest part of the day.

However, they are mostly folivorous (leaves represent the majority of the diet over the year, especially in the dry season) and they seem to choose food items based on quality (lower tannin content) rather than on availability.

[16] Stain-chested males engage in the most active marking, and chest staining seems to be related to testosterone levels.

This “grooming for sex” tactic allows males with a clean chest to get to copulate with females, even if at low rate.

[20] In this species play behavior persists into adulthood where it is used, especially by stranger males during the mating period, as an ice-breaking mechanism to reduce xenophobia.

[24] About 30% of infants are lost to predation by the Fossa (Cryptoprocta ferox) and a smaller number to raptors like the Madagascar harrier-hawk (Polyboroides radiatus).

[2] In the small spiny forest fragments of South Madagascar, sifaka abundance appears to be influenced by the proportion of large trees (diameter at breast height >=5 cm) and by the abundance of the plant species Allouadia procera,[26] a key species of the spiny forest habitat.

However, both severe droughts and an increased annual variation in rainfall levels can depress the population growth rate.