A principal feature of some hadrosaurids is the crest on top of the head. Palaeontologists are unsure of the purpose of this, but have a range of theories. It might be used simply to attract a mate, or perhaps as an aid to smell, since it seems to contain some smell receptors. However, tubes passing through the crest into the throat suggest a more interesting idea. Perhaps Corythosaurus uses its crest for blowing air through like a trumpet. Is this how these dinosaurs call to each other?

Dinosaur Timelines

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