Cheetahs run fast in order to catch the animals that are running away from them, so that they can then kill and eat those animals.
At maximum, all cougars run 45 mph at a short burst.
We are animals. I assume you mean wild animals. In which case they were built to do so. Their muscle and skeletal system allows from them to run fast.
When studying animals, their speed is an important factor to consider. A koala is known to run as fast as 25-45 miles per hour.
brachiate
When animals run altogether it is called a stampede
Some run slow, some don't run at all, & some run really fast. I know some bodybuilders and they run extremely fast. they all run the forty meter dash in 4.6 sec and better. They run a 5.13 minute mile.
People do not run fast, at all, when compared to other runners in the animal kingdom.
Small animals like turtles know they have no defense against larger animals, so they run so they can hide and get eaten.
They run fast to escape from predators such as lion can do too
Werewolves are not real animals so they can run as fast as the author wants to imagine them running.
All vampires can run fast, but they cant fly.