Check out this video of the Red Bank Regional concert choir’s performance last Friday of “Tres Cantos Nativos dos Indians Krao”, or “Three Songs from the Krao Tribe.”
The piece ends with the singers doing bird calls.
Here’s some background on the piece, from choir teacher Kris Zook:
Três Cantos Nativos dos Indios Kraó was composed in 1982 by Marcos Leite and is freely based on melodies sung by the Kraó tribe, a group of native Brazilian Indians who live in the Xingú river area of the Amazônia forest of northwestern Brazil. The work is divided into three short sections or cantos. The meaning of the text is not known; it was treated by the composer as a group of phonemes.
The video was posted on YouTube by SuperMomo1981.