What species are extinct in last 100 years and what are their causes of extinction?

Well i am sure most of the cat family is going extinct, but have not yet. While I am on the subject people need to save tigers and other cats in the world that are dying out. It is people that are killing their kind, what if you were the tiger and they were the one killing us, how would you feel about that. How would you feel if you were the one in the cage, or being separated from your family. What if your child can't even go to the zoo and see the wonderful animals like tigers, cheetahs, bob cats, mountain lions, or can't even have a house cat like you have at home with you right now, just think one after another, soon all cats and other animals will be gone. SO GO OUT AND FIGHT FOR THE RIGHTS THAT THESE ANIMALS HAVE....