Dinosaurs dominated the earth for over 165 million years, they went extinct 65 million years ago. The name dinosaurs come from the greek word that means “Terrible Lizard”. However, this is actually not correct because dinosaurs weren’t lizard at all. Lizards are one types of reptiles, while dinosaurs are another type.
During this time there were many different types of dinosaurs. But although they differ in size and shapes, they have one thing in common. A dinosaur body is built for walking on two legs. An animal that walks with two legs are called bipeds.This is different from the reptiles we have today.
65 million years ago, over a relatively short of time, dinosaurs suddenly disappeared. The cause of it is still being debated today. But the most popular theory is that an asteroid hit the earth causing major changes in the environment to which the dinosaurs couldn’t adapt.
Many people think that all dinosaurs were large in size. They weren’t. Dinosaurs come in may different sizes. Some dinosaurs were no bigger than the size of small chickens while other dinosaurs can grow to over 30 meters long. Most dinosaurs were somewhat in the middle. The bigger dinosaurs are mostly plant-eating dinosaurs. To this day no one knows how dinosaurs can get so big.
Carnivores, or meat eaters, ate other dinosaurs and other types of animals. These meat-eaters were also called predators, they need to have some way to get meat. They had sharp teeth and very athletic bodies for running and hunting prey. They also needed strong jaws, sharp teeth, and deadly claws so they could kill and then tear apart their prey. These dinosaurs were smart, they had good sense of smell and good eyesight.
Examples of carnivores include the Allosaurus, Deinonychus, Dilophosaurus, Pterosaurus, Spinosaurus, and the scary Tyrannosaurus rex.
Herbivores, or plant eaters, are dinosaurs that ate plants, leaves, fruits, grass and flowers. Their movements were usually slow as they didn’t have to chase after plants. They usually have blunt teeth that are good for eating vegetation like leaves. Many herbivores had pouches in their cheek to store food. These dinosaurs didn’t eat meat so they are not wild or dangerous animals.
Examples of herbivores include the Ankylosaurus, Brachiosaurus, Parasaurolophus, Stegosaurus, and the Triceratops.
Omnivores are smaller than the herbivore and carnivore dinosaurs. Not many dinosaurs ate both plants and animals. But they definitely stood a bigger chance of survival because they had a wider range of food choices, since they ate both plants and animals.
Examples of omnivores include the Oviraptor, and the Pachycephalosaurus.