closed‐mouth vocalizations of birds are living dinosaurs .
for more information about this collection please feel free to contact mark via send mail most birds vocalize with an open beak , but vocalization with a closed beak into an inflating cavity occurs in territorial or courtship displays in disparate species throughout birds .
but what hollywood wo n’t teach you is that t. rex may have had feathers .
they include web captures of the iskme.org website as well as captures from sites hosted by igc.org .
the odds are good what you envision has been brought to you in part by “ jurassic park , ” a plastic toy or some other facet of pop culture .
( perhaps you ’re a fan of stop - motion master ray harryhausen . )
 
though the jurassic job was fun , rydstrom remembers it as a tall order : he had to create dozens of distinct dinosaur noises this is a set of web collections curated by mark graham using the archive - it service of the internet archive .
closed‐mouth vocalizations generate resonance conditions that favor low‐frequency sounds .