The güiro (Spanish pronunciation: [ˈɡwiɾo]) is a Latin-American percussion instrument consisting of an open-ended, hollow gourd with parallel notches cut in one side. It is played by rubbing a stick or tines along the notches to produce a ratchet-like sound. The güiro is commonly used in Puerto Rican and other Latin-American music, and plays a key role in the typical rhythm section of important genres like cumbia and son.