Didgeridoo

A Didgeridoo is an ancient Australian instrument, possibly one of the oldest instruments in the world. It is made from a Eucalyptus branch that is hollowed out by termites. The termites build their nest around the base of the tree and eat it from inside out, so the branches are hollowed out before they are separated from the tree. Generally they are painted in bright colors with animal motifs. The opening at the top is coated with beeswax to fashion a mouthpiece, and you play it the same way you would a trumpet except there is only one note. Its sound is deep and rumbling and growly. Additional tones and harmonics come from the player humming or growling while they blow. Good players can play for hours without pausing by circular breathing.

In Australian Aboriginal culture the Didgeridoo is considered a male instrument, possibly because it resembles a male instrument, and women are discouraged from playing it.
Didgeridoo