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Re: And Your Bird Can Sing-Mesozoic theropod vocalizations?

On Tue, Nov 10th, 2009 at 11:59 AM, B tH <soylentgreenistrex@yahoo.com> wrote:

> How likely is it that they [dinosaurs] "roared" considering their kinship 
> with birds?

Roaring requires thickened vocal cords. I don't think birds actually have vocal 
cords, although that 
doesn't necessarily rule out their presence in dinosaurs.

Hissing, squawking, chirping and booming (via resonating chambers) could have 
certainly been 
possible. The unholy racket made by the tyrannosaur in the Jurassic Park movies 
may have been 


Dann Pigdon
GIS / Archaeologist                Australian Dinosaurs
Melbourne, Australia               http://home.alphalink.com.au/~dannj