what kind of animals were put together to make a gator?
http://animals.nationalgeographic.com/animals/prehistoric/brachychampsa-montana/
This may help, too:
http://en.wikipedia.org/wiki/Alligator
how many albino peacocks are left on the planet and why are they rare?
A gator, or an alligator, is not created by combining multiple species of animals. Alligators are a specific type of reptile that belong to the family Alligatoridae. They are native to the southeastern United States and eastern China.
Alligators have their own distinct genetic makeup and evolutionary history. They are not a combination or hybrid of other animals.