Nettl describes Pueblo music, including Hopi, Zuni, Taos Pueblo, San Ildefonso Pueblo, Santo Domingo Pueblo, and many others, as one of the most complex on the continent, featuring increased length and number of scale tones (hexatonic and heptatonic common), variety of form, melodic contour, and percussive accompaniment, ranges between an octave and a twelfth, with rhythmic complexity equal to the Plains sub-area. He cites the Kachina dance songs as the most complex songs and Hopi and Zuni material as the most complex of the Pueblo, while Tanoan and Keresan music is simpler and intermediate between the Plains and western Pueblos. The music of the Pima and Tohono O'odham is intermediary between the Plains-Pueblo and the California-Yuman music areas, with melodic movement of the Yuman, though including the rise, and the form and rhythm of the Pueblo.