Pterosaurs were considered reptiles, not birds or bats, and existed during most of mesozoic era, from late Triassic to the end of the cretaceous period
Stegosaurs was an herbivore that lived during the Jurassic period.
Tyrannosaurus Rex lived during Cretaceous period and was a carnivore. T-Rex is one of the most recognized species of dynosaurs and know for its fierceness.
Stegasaurs was extinct before the Tyrannosaurus walked the earth
Brachiosaurus belongs to a group of dinosaurs called sauropods, very large herbivores