The güiro is a 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 sound.
Puerto Rican güiro on display in the Musical Instrument Museum of Phoenix
Cuban güiro
Puerto Rican güiro or güícharo
Brazilian reco-reco
A percussion instrument is a musical instrument that is sounded by being struck or scraped by a beater including attached or enclosed beaters or rattles struck, scraped or rubbed by hand or struck against another similar instrument. Excluding zoomusicological instruments and the human voice, the percussion family is believed to include the oldest musical instruments. In spite of being a very common term to designate instruments, and to relate them to their players, the percussionists, percussion is not a systematic classificatory category of instruments, as described by the scientific field of organology. It is shown below that percussion instruments may belong to the organological classes of idiophone, membranophone, aerophone and chordophone.
Orchestral percussion section with timpani, unpitched auxiliary percussion and pitched tubular bells
Djembé and balafon played by Susu people of Guinea
Concussion idiophones (claves), and struck drums (conga drum)
Modern Japanese taiko percussion ensemble