Decorated with birds that pipe out song. Can be constructed at various scales and made fixed or portable. Inner system relies on changes in air and water pressure to keep the water circulating and the air moving through hidden flutes to produce birdsong.
Ramelli, Agostino. “Plate 186: Fountain with Chirping Birds Shown in Elevation and Cross-Section.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/02870w18r.