Which African tribe/nation uses this skull mask?

It looks awesome! I only hope that the original owner of those bones wasn't killed. Hopefully, one of the tribesmen died a natural death, and this mask was made from his bones after he died:


http://media.monstersandcritics.com/arti鈥?/a>Which African tribe/nation uses this skull mask?
Probably an area where there are head hunters like New Guinea. I doubt he died a peaceful death.Which African tribe/nation uses this skull mask?
Zulu?

cat skin problem