![A parasaurolophus, a type of herbivorous ornithopod dinosaur of the hadrosaur family stands on two legs and calls out. On a solid white background Stock Photo - Alamy A parasaurolophus, a type of herbivorous ornithopod dinosaur of the hadrosaur family stands on two legs and calls out. On a solid white background Stock Photo - Alamy](https://c8.alamy.com/comp/T00F2J/a-parasaurolophus-a-type-of-herbivorous-ornithopod-dinosaur-of-the-hadrosaur-family-stands-on-two-legs-and-calls-out-on-a-solid-white-background-T00F2J.jpg)
A parasaurolophus, a type of herbivorous ornithopod dinosaur of the hadrosaur family stands on two legs and calls out. On a solid white background Stock Photo - Alamy
![Mbiresaurus raathi: Two-legged dinosaur from Zimbabwe is the oldest ever found in Africa | New Scientist Mbiresaurus raathi: Two-legged dinosaur from Zimbabwe is the oldest ever found in Africa | New Scientist](https://images.newscientist.com/wp-content/uploads/2022/08/26113132/SEI_121034697.jpg)
Mbiresaurus raathi: Two-legged dinosaur from Zimbabwe is the oldest ever found in Africa | New Scientist
![Two-Legged, Meat-Eating Dinosaurs: Ranking Their Speed, Strength, and Smarts (Dinosaurs by Design): Weakland, Mark: 9781644660317: Amazon.com: Books Two-Legged, Meat-Eating Dinosaurs: Ranking Their Speed, Strength, and Smarts (Dinosaurs by Design): Weakland, Mark: 9781644660317: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/91+5vU4gIwL._AC_UL600_SR600,600_.jpg)
Two-Legged, Meat-Eating Dinosaurs: Ranking Their Speed, Strength, and Smarts (Dinosaurs by Design): Weakland, Mark: 9781644660317: Amazon.com: Books
![A parasaurolophus, a type of herbivorous ornithopod dinosaur of the hadrosaur family stands on two legs. This animal is on a white background Stock Photo - Alamy A parasaurolophus, a type of herbivorous ornithopod dinosaur of the hadrosaur family stands on two legs. This animal is on a white background Stock Photo - Alamy](https://c8.alamy.com/comp/T00F4A/a-parasaurolophus-a-type-of-herbivorous-ornithopod-dinosaur-of-the-hadrosaur-family-stands-on-two-legs-this-animal-is-on-a-white-background-T00F4A.jpg)