A group of bonobos in the D.R. Congo (formerly Zaire) gather sugar cane and carry it away while walking bipedally. Also touches on the the matriarchal nature of bonobo society.
From the NatGeo documentary "The New Chimpanzees".
More Information:
http://en.wikipedia.org/wiki/Bonobo
http://www.amazon.com/National-Geographic-New-Chimpanzees/dp/6304841256