The Sumatran tiger is only one of two cats that likes to:

The Sumatran tiger is found in only one place on Earth—on the island of Sumatra in Indonesia. Fewer than 500 of them are left. They may soon become extinct because people are killing them to sell their skin, teeth, and claws. Also, their habitat is being destroyed as people create farmland.
The Sumatran tiger is only one of two cats that likes to:
howl at the moon
swim in pools or streams
play hide-and-seek with other tigers
Sumatran tigers often cool off in a pool or stream. The webbing between their toes helps them swim fast. The jaguar is another water-loving cat.
Tigers mark their territory by:
peeing on trees and plants
building fences around their homes
posting "Keep Out" signs on trees
Tigers pee on trees and plants to mark their territory. When you walk a dog, you may notice that it stops lots of times to pee. That's normal! It's a dog or a tiger's way of saying, "Keep out! You're on my turf now!"
Joel Cracraft
The majesty of tigers has always excited me, so I was thrilled when I had an opportunity to study them, and help in their conservation.
The Sumatran tiger is the largest kind of tiger.
The Sumatran tiger is the smallest of all tigers. Its compact size helps it move quickly through the jungle. The Siberian tiger is the largest.
During the 20th century, three kinds of tigers became extinct.
Three kinds of tigers are gone forever. The Bali tiger died out in the 1940s, the Caspian tiger in the '60s or '70s, and the Javan tiger in the late '70s.
Scientific name: Pantera tigris sumatrae
Size: eight feet long, 265 pounds
Habitat: found only in the tropical forests of the island of Sumatra in Indonesia
Diet: eats fish, crocodiles, birds, and mammals
Characteristics: the world's smallest tiger; its black stripes help camouflage it in forests
Significance: there are only about 500 Sumatran tigers left in Sumatra today