Tyrannosaurus rex
Tyrannosaurus rex is one of the few apex predators that roam through Mesos. With its bone crushing bite, different hunting tactics when growing and their social structure, they deserve the title of "King of Tyrants" wherever they live.
Common Names
English: TyrantsBasic Information
Anatomy
Tyrannosaurus rex is a large bipedal theropod. It has two muscly legs with three fingers and two small yet strong arms with two fingers. It possesses a large tail which counterbalances its massive head.
The most distinctive feature of a Tyrannosaurus is its head. These animals have one of the biggest skulls there are. They have thick teeth of around 15 centimeters long. Tyrannosaurus rex can also be distinguished by a rough texture on the front of their skulls, just at the back of their nostrils, which exists to give this animal's skull a strong resistance to impact to achieve a high biting force. Tyrannosaurus can also be found with this part of their heads colored.
Tyrannosaurus are covered in feathers on the top of the head, neck, back and tail. The feathers on the head and neck are larger than in the rest of the body in males, probably due to sexual dimorphism. The rest of the skin is covered in scales. The skin is of around 8 centimeters thick.
Biological Traits
Genetics and Reproduction
Tyrannosaurus rex reproduce in an act known as a “cloacal kiss”. In this sexual reproduction, both a male and a female will make their cloaca touch each other, so that the male can impregnate the female.
To do such a thing, two Tyrannosaurus of opposite gender must pair with each other. This happens when two unpaired adults meet each other. If they are not desperate for food, they will try to convince the other to form a pair by emitting low growls. These growls are speculated to induce sexual hormones on other Tyrannosaurus but may not work if the prospect to pair has other interests like food or caring for young.
Pairing and reproduction occur at the same time. Once the pair has copulated, both adults emit very low frequency sounds that other Tyrannosaurus can hear around 50 kilometers away. This sounds can shake trees and pebbles close and are used to scare away any other Tyrannosaurus rex that could dare to come to steal the others pair or to kill their hatchlings.
After some days of reproduction, the female loses interest on reproducing. She would reject any intentions of the male to reproduce and might even get aggressive if the male doesn’t stop. This is because she is already pregnant and needs no more copulating. Two weeks after the pair stops copulating, the female prepares a nest in their den and puts one egg, in rare occasions two. After laying the eggs but parents make the same branch shakings sounds to scare any animal that could endanger the lives of their eggs. Two months after laying the egg, a hatchling would be born and be care for his entire life until adulthood.
Tyrannosaurus rex pairs are known to have an egg at least once a year during spring or summer.
Growth Rate & Stages
During their hatchling and juvenile lives, Tyrannosaurus rex have very long legs and a slim snout. This difference from their adult stage exist to allow initial growth stages to easily run off from danger when needed.
When they get to sub-adult stage, their skull starts getting thicker and part of their sexual marks start showing up. Sub-adult Tyrannosaurus rex still have a slimmer build compared to adults and can easily outrun adults.
Ecology and Habitats
Dietary Needs and Habits
Tyrannosaurus rex is a carnivore. They like eating big prey that can’t outrun their chase. To do this, Tyrannosaurus usually rely on ambush to hunt. They use big trees to cover themselves and run directly into distracted herbivores to give a devastating chomp.
Tyrannosaurus are known to hit vital parts with their bone crushing bite. They usually aim for skulls, hitting close to the ears of animals to penetrate their teeth into their brains and causing an instant death.
Sub-adult Tyrannosaurus rex help their parents during hunts. They make use of their higher speed to guide prey into death traps where the adults wait to ambush.
When hunting is not an option, some tyrannosaurus make use of their keen scent to locate food that has already being hunted. Since Tyrannosaurus rex are apex predators, very few animals dare to challenge an adult for food and prefer to run away and wait for leftovers.
Biological Cycle
Additional Information
Social Structure
Average Intelligence
Perception and Sensory Capabilities
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