Most tiger have more than 100 stripes, and no two tiger have identical stripes. A group of tigers is called a streak.The roar of a tiger can be heard more than a mile away.White tigers are very rare.In their solitary, nighttime hunt, Sumatran tigers travel as much as 20 miles in a single night.Wild tigers typically avoid human contact.A tiger can leap as much as 10 feet (3 meters) in a single jump.The smallest of all the tiger species is the Sumatran tiger.A meal for a tiger may be as much as 50 to 70 pounds (22.7 to 31.8 kilograms), but tigers may often go a week without food.Tiger cubs are born blind, weighing about two pounds, and nurse for six months.A tiger may succeed in catching a meal in only one of ten to 20 hunts.Of the high-frequency and low-frequency sounds of a tiger's roar, the low-frequency sounds (infrasounds) cannot be heard by humans.