The figure of Tyrannosaurus rex
Tyrannosaurus rex is weird and huge. Its forelimbs are almost as short as human arms. It is found that Tyrannosaurus rex may hunt with its mouth and seldom use its forelimbs, so its forelimbs degenerate and become short and small, and slowly it can only stand and walk on its hind legs. In addition, Tyrannosaurus Rex has a long and narrow head and muscular cheeks. There are about 60 sharp teeth in the big mouth Its neck is short and thick, its body is strong, its hind legs are strong and stout, and its tail can be straightened backwards to balance its body.
The skull of Tyrannosaurus rex
Judging from the shape of Tyrannosaurus Rex's skull, it has a wide upper jaw and a narrow lower jaw, and the forces on the upper and lower teeth are not exactly equal when occluding, which is beneficial to biting off bones. His head is also the largest and most powerful of all dinosaurs, and the two rows of sword-shaped teeth bent inward in his big mouth make his prey even more creepy. Once bitten, even large dinosaurs with tough bones could not bear it. After catching the prey, this terrible carnivore will kill the prey with a huge jaw with sabre-like teeth, then twist its strong neck and tear off the meat.
Tyrannosaurus family
The unnamed Erie E Long, who lived in the Middle Jurassic about 65,438+65 million years ago, may be the earliest known member of Tyrannosaurus Rex. The unknown Ilya E Long was discovered in England, and its fossil data only contained a pair of Ilya, named after its shape was similar to that of the alligator Ilya. Tyrannosaurus Rex is the best member of the Tyrannosaurus Rex family, but the largest Tyrannosaurus Rex can even make a dull sound when walking, which shows that he is a heavyweight dinosaur. The head stretches forward, as if ready to prey, while the back and tail are horizontal. Tyrannosaurus Rex is the largest carnivorous dinosaur found in Asia. It is very similar to Tyrannosaurus Rex, except that it is slightly thinner. Tyrannosaurus rex is a very powerful carnivore, and dinosaurs in the same time and area are very afraid of it. Like other Tyrannosaurus Rex dinosaurs, Tyrannosaurus Rex had a keen sense of smell, which helped it find prey or dead dinosaurs.
The lifestyle of Tyrannosaurus rex
Paleontologists have long debated whether Tyrannosaurus Rex was a predator or a scavenger. A research team in the United States published their research on Tyrannosaurus Rex. The results showed that Tyrannosaurus Rex did not run very slowly, about 18-40 kilometers per hour, so Tyrannosaurus Rex should feed on the corpses of other animals. Researchers who hold the view that Tyrannosaurus Rex is a predator believe that Tyrannosaurus Rex's hearing is very sensitive and special, and its jaws, teeth and even forelimbs can be used as offensive weapons, so Tyrannosaurus Rex should be an active predator.
Courtship strategy of Tyrannosaurus Rex
Female Tyrannosaurus Rex needs to eat enough food to lay eggs in the best condition before nesting and hatching, so male Tyrannosaurus Rex catches enough prey before courtship and gives it to female Tyrannosaurus Rex to win the favor of female Tyrannosaurus Rex. Male Tyrannosaurus Rex can also attract female Tyrannosaurus Rex. Another more important reason is that the female Tyrannosaurus Rex is bigger than the male Tyrannosaurus Rex, so the male Tyrannosaurus Rex must feed the female Tyrannosaurus Rex to avoid being eaten by the female Tyrannosaurus Rex as food.
Dinosaur business card
Name: Tyrannosaurus Rex
Period: the end of Cretaceous
Appearance: 12m long, 6~7 tons.
Genus; Theropod animal
Distribution: North America: USA and Canada.