Bwiti' dance (Gabon)

engue | May 02, 2007
A pinch of dance, a pinch of music, add a few gabonese dancers, shake it properly, use and abuse as you like my friend...
Mokodo
e-monsite.com/gabonorigines/

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From http://en.wikipedia.org/wiki/Bwiti
"Bwiti is a West Central African religion practiced by the forest-dwelling Babongo and Mitsogo people of Gabon, where it is one of the three official religions, and the Fang people of Gabon and Cameroon. Modern Bwiti is syncretistic, incorporating animism, ancestor worship and Christianity into its belief system."

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Here's the comment that I wrote on this video's viewer comment thread:
This skillfully produced video is a culturally collage of Bwiti' traditional music, song, & dances.Sometimes the female dancers wear traditional clothing (with top coverings) & sometimes dancers wear contemporary Western style clothing. This video is appropriate for school viewing. Thanks for sharing this beautiful, creative culture with the world!

What are the traditional names of the bow harp and the instrument with a carved head that is plucked in this video?
-an African American sista