There are six subspecies of tiger living today; Amur, Bengal, Indochinese, Malayan, Sumatran, and South China.
Tigers can reach up to 9ft long and weigh 363Kg. That's the same weight as 10 ten year old children.
No two tigers have the same stripe pattern, it goes skin deep. Researchers and conservationists can use this to identify and count tigers.
Tigers don't use phones, it's lucky then that their roar can be heard up to 3 Kilometers away!