Spirit masks are not designed to be worn, but are mounted in men's houses or spirit houses. 
The clans of the Sepik River region each identify with a "clan spirit", often a bird or animal that is abundant in their area. This mask has an elongated face with two hornbills on each side and one on the forehead and slanted eyes. 
The great hornbill is long-lived, living for nearly 50 years in captivity.  With wingspans of 5 feet and over, they sometimes fly at great height over forests, creating an ominous sound that can be heard from a distance.
Carved from rainforest hardwood.
The mask measures 23"H x 8" W x 5" D.
With the museum stand it is 27"H. The base is 7" x 7".