What is Siberian tiger?
{{Subspeciesbox | name = Siberian tiger | image = File:Sibirischer tiger de edit02.jpg | image_caption = Male | image2 = P.t.altaica female.jpg | image2_caption = Female | status = EN | status_system = IUCN3.1 | status_ref = <ref name=iucn>{{IUCN |assessors=Miquelle, D., Darman, Y. & Seryodkin, I. |year=2011 |taxon=''Panthera tigris'' ssp. ''altaica'' |id=15956 |version=2017-3}} {{doi|10.2305/IUCN.UK.2011-2.RLTS.T15956A5333650.en}}</ref> | genus = Panthera | species = tigris | species_link = Tiger | subspecies = tigris | authority = ([[Linnaeus]], 1758) | synonyms_ref = <ref name=MSW3>{{MSW3 Carnivora |id=14000261 |page=546}}</ref> | range_map = Panthera tigris altaica dark world.png | range_map_caption = Distribution of the Siberian tiger (in red) }} The '''Siberian tiger''' or '''Amur tiger''' (''Panthera tigris tigris'') is the largest [[felid]] in the world. They live in eastern [[Russia]]'s birch [[forest]]s, and there are some in [[China]] and [[North Korea]]. It is estimated that there are around 400 to 500 Siberian tigers left in the wild.<ref>{{cite web |url= http://animals.nationalgeographic.com/animals/mammals/siberian-tiger/ |title=Siberian Tigers, Siberian Tiger Pictures, Siberian Tiger Facts|work=National Geographic |year=2012}}</ref> In 2017, the Cat Specialist Group revised felid taxonomy and now recognizes all the tiger populations in mainland Asia as P. t. tigris.<ref>[https://repository.si.edu/bitstream/handle/10088/32616/A_revised_Felidae_Taxonomy_CatNews.pdf?sequence=1&isAllowed=y Kitchener A.C. and others]</ref> The average historical wild male Siberian tiger weighed 215.3 kg (475 lb) and the female 137.5 kg (303 lb); the contemporary wild male Siberian tiger weighs 176.4 kg (389 lb) on average with an asymptotic limit being 222.3 kg (490 lb); a wild female weighs 117.9 kg (260 lb) on average. Historical Siberian tigers and Bengal tigers were the largest ones, whereas contemporary Siberian tigers are on average lighter than [[Bengal tiger|Bengal tigers]]. The reduction of the body weight