Carnotaurus

Carnotaurus, also known as Carnotaurs ("Meat-eating bull"), were a species of carnivorous dinosaur that lived in the Late Cretaceous period 72-69.9 million years ago in South America. They appear as the main antagonists in the 2000 Disney CG film Dinosaur, alongside Kron.

Physical Description
The Carnotaurs are vicious-looking, meat-eating dinosaurs with red scales, large tails, sharp teeth, and short horns. The two Carnotaurs that serve as the film's main antagonists are noticeably different in size, though it is unknown whether they are a mated pair or just relatives.

Personality
Not necessarily evil, they are predators who need food and water to survive. This is the main reason for the confrontation in the film; they have no real malicious intent. They just care about feeding themselves and only show respect for themselves and no one else. However, they are somewhat smart and cunning, as they follow the herd's footprints to find food and water, then later allow an injured Bruton to escape so he could lead them to the rest of the herd. The two in the movie might be a mated pair, relatives or perhaps the larger carnotaur was the parent of the smaller one, but they have a very strong bond and the surviving one shows a powerful grudge against Aladar, trying to drag him over a cliff even when it was obvious the Carnotaur would die, after the other one was crushed by rocks Aladar's friends caused to fall on it.

Even so, they are extremely vicious, dangerous and feared, described as a "mouthful of teeth with a bad attitude" by Eema.

Dinosaur
A Carnotaurus first appears at the beginning of the film where a Baby Parasaurolophus chases a flying lizard into the jungle. The flying lizard eventually landed on what appeared to be the bark of a large tree. The young dinosaur looks up to where the reptile is, but before it can get close, saliva falls on the branch next to it, causing the young dinosaur to look up where the lizard landed: the nose of a Carnotaur, which quickly awakens. The young Parasaurolophus runs out of the jungle in terror, getting the attention of many of the herbivorous dinosaurs. The Carnotaur bursts out of the treeline immediately after and starts chasing the dinosaurs, smashing all but Aladar|one of the eggs in an Iguanodon's nest in the process. Ultimately, the chase ends when the Carnotaur runs down and kills a Pachyrhinosaurus.

At the middle of the film, two Carnotaurus (the male presumably the same one from the beginning of the movie) scare off a pack of Velociraptors from the remains of a Struthiomimus. The pair then go after the herd in which Aladar, his lemur family and dinosaur friends are in by following the tracks left behind.

Later, Bruton and a scout are attacked by the Carnotaurus while searching for water. Bruton escapes to warn Kron, albeit injured, as the scout is killed by them. As soon as Bruton tells Kron, he is left behind to fend for himself, having unintentionally led the predators to the rest of the herd. That night, the Carnotaurs stop for water before noticing new tracks in the distance and resuming their hunt.

Later, as Aladar, his family, friends and Bruton take shelter from a rainstorm in a cave, the Carnotaurs inevitably discover them and attack. Bruton comes to the rescue and sacrifices himself by causing a cave-in, burying the female Carnotaur. The male survives, however, leaving and roaring in vengeance, apparently upset at the loss of his mate, before continuing his search for the herd.

After Aladar and company find the Nesting Grounds, Aladar rushes back to warn Kron's herd about the rock pile and ravine blocking the main entrance. On the way there, he see a dead Stygimoloch and quickly hides when he hears the Carnotaur coming to eat the Stygimoloch. Aladar manages to escape shortly after, unintentionally getting the Carnotaur's attention.

The next day, Aladar reaches the herd and tries to warn Kron about the approaching Carnotaur. Kron refuses to listen, however, as he thinks Aladar is leading the carnivore right to the herd. After his battle with Kron, Aladar assumes the herd's leadership. Unfortunately, the Carnotaur arrives shortly after and the herd panics. Aladar orders the herd to stand together to avoid being picked off. The plan works and the Carnotaur backs down. Suddenly, he spots Kron and runs after him, with Neera and Aladar not far behind. After Kron climbs the rocks only to find himself facing a cliff, the Carnotaur corners him. Kron fights back, but the Carnotaur bites him in the back and tosses him against a rock. As it is about to finish him off, Neera comes and assaults the Carnotaur in an attempt to save her brother, but is easily overpowered. The Carnotaur then prepares to finish Neera, but Aladar arrives, and manages to push the Carnotaur to the edge of the cliff. As the Carnotaur faces Aladar, his heavy weight causes the cliff ledge to crumble. As the cliff starts to crack, the Carnotaur grabs Aladar and tries to pull him down with him, but fails, and the Carnotaur falls off the cliff to his death.