Serēre
Serēre whistle of the S. American Choco Indians, also of the Chiriguano and Yurucare. It originated in Peru and consists of a piece of rectangular wood with conical bore, held vertically, suspended from the player's neck on a cord; 11–55 cm. (4–21 ½ in.) long (105). Izikowitz, Karl Gustav. Musical and Other Sound Instruments of the South American Indians. Gothenborg, 1935.