Key Identification Features
- The hair on the back of its hands and feet is black or dark brown, which is a key distinguishing feature from other northern "gray-necked" Aotus species; it also has shorter fur than these relatives.
- Other distinguishing features relate to its skull, which has a broad braincase, a depressed interorbital region, and large molariform teeth.
- At least nine distinct vocal calls have been reported, including different types of grunts, screams, squeals, moans, and trills.
- This species is known for forming monogamous pair bonds, and parental duties are shared between the breeding pair and juveniles in the troop.
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