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__ Dinosaurs Habits __ Some dinosaurs had armour [such as claws and horns] so they could fight other dinosaurs. __ Examples:  __ Tyrannosaurus Rex: sharp claws Triceratops: spiky horns Pterodactyl: long wings Euoplocephalus: horny back Some dinosaurs stayed in herds to find water and food. __ Examples:  __ Sauropods Ceratopians Hadrosaurs Some dinosaurs have sexual features that attract other dinosaurs. __ Examples: __  The Stegosaur plates The ceratopian horns, including those whose position prevents them from being used directly against enemies. The spines of spinosaurs, ouranosaurs, and some sauropods. The oviraptor crests. The ceratosaur and dilophosaur horns. The hadrosaur crests. The heterodontosaur tusks. The pachycephalosaur skulls. The deinonychosaur sickle-claws.