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The pterodactyl was a winged reptile of the Jurassic period that lived roughly 150 million years ago. As the term "dinosaur" generally refers to creatures walking upright on two or four feet, and the pterodactyl flew or ... More »

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The average pterodactyl had a wingspan of 3 feet and weighed between 2 to 10 pounds. Pterodactyls were not dinosaurs, though both groups belong to the same scientific grouping, the archosaurs. More »

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Scientists do not know exactly why the pterodactyls died out approximately 65 million years ago. Some scientists believe that they died as a result of a meteor impact, while others believe climate change was to blame. So... More »

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The average pterodactyl had a wingspan of 3 feet and weighed between 2 to 10 pounds. Pterodactyls were not dinosaurs, though both groups belong to the same scientific grouping, the archosaurs. More »

www.reference.com Pets & Animals Dinosaurs

Large herbivorous Sauropods and equally large carnivorous Carnosaurs lived during the Jurassic period, as well as smaller, quicker animals. Additionally, the first birds evolved from dinosaurs with simple feathers during... More »

www.reference.com Pets & Animals Dinosaurs

Muttaburrasaurus was a primarily herbivorous dinosaur from the early Cretaceous period of roughly 112 to 104 million years ago. The species is known from fossils found near Queensland, Australia. More »

www.reference.com Pets & Animals Dinosaurs

Tyrannosaurus rex dinosaurs lived during the late Cretaceous period, which was about 65 million years ago, on a continent named Laramidia. Laramidia is now part of North America. The name Tyrannosaurus rex means "tyrant ... More »

www.reference.com Pets & Animals Dinosaurs