<P> This population inhabits the Amur - Ussuri region of Primorsky Krai and Khabarovsk Krai in far eastern Siberia, with a small population in Hunchun National Siberian Tiger Nature Reserve in northeastern China near the border to North Korea . It is extinct in Mongolia, North Korea, and South Korea . In 2005, there were 331--393 adult and subadult Siberian tigers in the region, with a breeding adult population of about 250 individuals . As of 2015, there was an estimated population of 480 - 540 individuals in the Russian Far East . </P> <Tr> <Td> Indochinese tiger (P. t . tigris), formerly P. t . corbetti Mazák, 1968 </Td> <Td> The Indochinese tiger was described as being smaller than the Bengal tiger and as having a smaller skull . Males average 108 inches (270 cm) in total length and weigh between 150 and 195 kg (331 and 430 lb), while females average 96 inches (240 cm) and 100--130 kg (220--290 lb). <P> This population occurs in Myanmar, Thailand, Laos, but has not been recorded in Vietnam since 1997 . In 2010, the population in Indochina was estimated at about 350 individuals . In Southeast Asia, tiger populations have declined in key areas and are threatened by illegal production of tiger bone for use in traditional medicine . </P> </Td> <Td> </Td> </Tr> <P> This population occurs in Myanmar, Thailand, Laos, but has not been recorded in Vietnam since 1997 . In 2010, the population in Indochina was estimated at about 350 individuals . In Southeast Asia, tiger populations have declined in key areas and are threatened by illegal production of tiger bone for use in traditional medicine . </P> <Tr> <Td> Malayan tiger (P. t . tigris), formerly P. t . jacksoni Luo et al., 2004 </Td> <Td> There is no clear difference between the Malayan and the Indochinese tiger in pelage or skull size . It was proposed as a distinct subspecies on the basis of mtDNA and micro-satellite sequences that differs from the Indochinese tiger . <P> Males range in total length from 190--280 cm (75--110 in) and weigh between 47.2 to 129.1 kg (104 to 285 lb), while females range from 180--260 cm (71--102 in) and 24 to 88 kg (53 to 194 lb). </P> <P> The population was roughly estimated at 250 to 340 adult individuals in 2013, and likely comprised less than 200 mature breeding individuals at the time . The geographic division between Malayan and Indochinese tigers is unclear as tiger populations in northern Malaysia are contiguous with those in southern Thailand . In Singapore the last tiger was shot in 1932; tigers are considered extirpated since the 1950s . </P> </Td> <Td> </Td> </Tr>

When were tigers listed on the endangered species list