Help naming an instrument

[The Tree]

I have seen a few people busking around town over the past while with a strange instrument that i am trying to put a name to.it almost looks like a bow.its got a curved piece of stick and has a string going from one tip to the other.its is played by another stick hitting the string at different points to get different sound.it gives off a kind of twangy sound.i really like the sound of it and would like to get the name of it so i could look up more on it.they almost look like they could be homemade.

[dr john]

It's a musical bow (see Wikipedia), used mainly in Angola + S Africa.