Dinosaurs were not silent creatures. They used vocalizations much like today's modern animals do. Watch out for these roars though. They are probably a final warning. The T-Rex and Raptors are expected but even the herbivores like Parasaurolophus had a mighty sound. Do you love nature? Use Magisto's "Wild Nature" filter on your own video to win a prize pack from Discovery. Enter at bit.ly/1lzHrdF Watch the whole playlist of dinosaur videos here: www.youtube.com/watch?v=sW4p6vzviKQ&list=PLfpPYJH6OjtZGZH1hlR40wD4rnq14p41x&index=1 Subscribe For More Dinosaur Videos: www.youtube.com/subscription_center?add_user=discoverydinosaurs

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