Hadrosaurs were basically the cows
        
        
          of the Cretaceous. They would have
        
        
          been a familiar sight in the forests and
        
        
          swamps of North America.
        
        
          
            What a sight!
          
        
        
          Hadrosaurs are
        
        
          known for having
        
        
          some of the strangest
        
        
          heads of all dinosaurs;
        
        
          many of them had
        
        
          a crest.
        
        
          
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          Horns
        
        
          and frills
        
        
          Hadrosaurs had stiff
        
        
          tails. It is unlikely these
        
        
          were swung from side
        
        
          to side.
        
        
          
            Parasaurolophus
          
        
        
          Cretaceous cows
        
        
          Male hadrosaurs
        
        
          probably had
        
        
          larger crests
        
        
          than the females.
        
        
          
            
              Lambeosaurus
            
          
        
        
          had a
        
        
          helmet-like crest.
        
        
          
            
              Tsintaosaurus’
            
          
        
        
          crest may
        
        
          have been covered in
        
        
          brightly coloured skin.
        
        
          
            
              Corythosaurus
            
          
        
        
          had a
        
        
          plate-like crest.
        
        
          
            All sorts of crests
          
        
        
          Those striking crests
        
        
          came in all sorts of
        
        
          different shapes.
        
        
          Can you think of any crested animals today?
        
        
          
            194
          
        
        
          
            Age of the dinosaurs