I want to turn them into english

The extinction of tiger mainly comes from human activities which cause their habitats to decrease in numbers and size.
Tigers that live in the north are usually bigger in size and shallow in colours. However, tigers that live in the south are smaller in size but deeper in colours.
Tigers are carnivores. All common tigers have their own place to live, besides when it is time to copulate, they will unlikely to come into contact with others. Female tigers also isolate themselves when they give birth and feed their offsprings.

Moreover, when a tiger has matured, its mother will leave him and go find other domains.

Tigers mainly eat deers, wild boars and others herbivores. They must find an area with enough food to maintain their lives. Their way of hunting is to ambush their targets. However, they will also get attacked by other animals to obtain their feathers, bones and organs when they are in a shortage of food. It has become a trandition to hunt these cat-like animals because it represents a sign of energy and courage.

After 19th century, the distribution of tigers in Asia have revealed the reduction. At the beginning of the 20th centery, there are approximately 10 thousand wild tigers in the world. However, the population have now reduced to several thousands. There are already 3 kinds of tigers that have been extincted before 1980. The distribution of five other genus have decreased greatly. This is in a severe conditon due to the scarce separation of the tigers and the decrease in the population. Today, majority of genus have less than 100 tigers. The long-term inbreeding and unbalanced sex proportion have caused to decrease the multiplicity in heredity and the quality in heredity.
Tigers can be separated into 9 genus, however 3 genus have already extincted