Made from the jawbone of a donkey, with it's original teeth intact, the quijada is a member of the idiophone family.
The quijada is traditionally used in Peru and Cuba, but other Latin American countries use it as well. For instance, the quijada will accompanies the marimba in Honduras and Costa Rica.
An interesting note is Cuba, the Quijada generally plays the "slap" on the 1, more of an effect. Peru and other South American countries use it more as a "güiro", since they traditionally didn't have other scraped instruments.
See the examples below.
Music Notation Examples
And here is a piece of how it would be played in Festejo style in Peru.
Music Styles
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Son Montuno Samples Demo
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Quijada example - Festejo (Peru)