What is the largest subspecies of tiger?

The Siberian tiger is traditionally recognized as the largest tiger subspecies. It is also called the Amur tiger and lives mainly in the Russian Far East, with a smaller population extending into northeastern China.

Its large body, dense fur and substantial fat reserves reflect adaptation to a colder climate. Adult males are especially large, although reported weights vary widely depending on whether measurements come from wild animals, exceptionally large specimens or captive tigers. Bengal tigers can approach Siberian tigers in size, so the claim is best understood as the conventional comparison rather than an absolute rule for every individual.

The tiger’s taxonomy has also changed. Modern classifications often group mainland tiger populations under Panthera tigris tigris, treating “Siberian tiger” as a regional population rather than a separately valid subspecies. Many quiz references still use the older subspecies framework, in which the Siberian tiger is Panthera tigris altaica.

The population was severely reduced by hunting in the twentieth century but recovered after strong protection. Habitat fragmentation, prey availability and illegal killing remain conservation concerns.