Australia: The Land Where Time Began

A biography of the Australian continent 

Dinosaur Biology - Vocalisation

There are no reptiles with vocal abilities that are truly sophisticated, the best being found in the crocodilians. According to the author1 some birds have a vocal performance that is limited, though there are many that have developed a varied and sophisticated vocal repertoire that is only present outside the birds in humans. There are a number of birds that are very good at mimicking various sounds, even artificial sounds, and parrots can mimic the sounds of human speech. Birds that have elongated tracheal loops in their chests use to produce vocalisations at high volume. Cassowaries use low frequency sound to communicate over long distances, a form of communication that is also used by elephants. The author1 suggests it is doubtful the dinosaurs had more than limited vocal abilities that rivaled those of birds and mammals, though he suggests the sound-generating ability of dinosaurs probably exceeded that of reptiles. Among the long-necked dinosaurs he suggests there could possibly have been the ability to produce powerful low-frequency sounds with their long trachea, possibly over long distances.

Vocalisation is produced through the  mouth, not the nasal passages, though complex nasal passages act as supplementary resonating chambers. In the lambeosaurine hadrosaurs this system is present in an extreme form.

Sources & Further reading

  1. Paul, Gregory S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press.
  2. Manning, Phillip, Jurassic CSI, National Geographic DVD

 

 

 

 

 

Author: M. H. Monroe
Email:  admin@austhrutime.com
Last Updated 27/01/2012 
 

 

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                                                                                           Author: M.H.Monroe  Email: admin@austhrutime.com     Sources & Further reading