The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)

  title={The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)},
  author={Abbot S. Gaunt and Sandra L. L. Gaunt and Henry D. Prange and Jeremy S. Wasser},
  journal={Journal of Comparative Physiology A},
SummaryIt is generally supposed that the elongated, often coiled tracheae of many species of birds are adaptations for the production of loud, penetrating calls. A corollary supposition is that the acoustic effects are produced by the resonant properties of the elongated tube, with the birds being analogized to a wind instrument. We have experimented with several species of cranes possessing different degrees of tracheal coiling. Regardless of the degree of coiling, all cranes can utter… 
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