|Photo credit: Kieron Nelson (Link)|
"Kalapalo men playing uruá flutes at the Kuarup Ritual at Aiha Village in the Xingu Indigenous Park (Brazil). Two men in their feather headdresses play bamboo Uruá flutes. One tube of the giant Uruá double flute is over 2 meters long, the other is 1.5 meters. The tubes, about five centimeters in diameter, are made by lashing two lengths of bamboo together."
Bamboo Flutes Exploration (this blog)
Bamboo World Ecozone