Appearance
In Sri Lankan subspecies, dorsal area gray to brownish gray in color, getting darker with the age. Underparts are light grayish. Short whitish beard and sideburns present. The hairs of the crown form a distinct tuft, hence the name. Black eyebrows project outward. Head scarcely paler or not paler than back. Hands and feet are same color as limbs.
Naming
It is one of several "Semnopithecus" species named after characters from "The Iliad", along with "Semnopithecus hector" and "Semnopithecus ajax". There are two subspecies, "Semnopithecus priam thersites" in Sri Lanka and the southern Western Ghats in India, and "Semnopithecus priam priam" from Andhra Pradesh to Tamil Nadu in India.In Sinhala language, it is known as හැලි වදුරා.
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