The tiger is a large, powerful cat belonging to the genus Panthera, native to Asia. It is characterized by its distinctive orange fur with black stripes, a muscular body, and large paws. Traditionally, nine subspecies have been recognized, although some classifications simplify this into two groups: mainland Asian tigers and the Sunda Islands tigers.
In 1924, the fossil species Panthera palaeosinensis of early Pleistocene northern China was discovered and described as a possible tiger ancestor.
By 1925, an estimated 80,000 tigers were killed between 1875 and 1925, due to hunting for trophies and perceived danger.
In 1929, Reginald Innes Pocock classified the tiger within the genus Panthera, giving it the scientific name Panthera tigris.
Beginning in 1935 and continuing to 2006, tiger attacks in the Sundarbans caused 1,396 human deaths, according to official records.
Data from the International Tiger Studbook 1938–2018 indicate that captive tigers lived up to 19 years.
In Bhutan, the tiger has been protected since 1969.
Since 1972, the tiger has been afforded the highest protection level under India's Wild Life (Protection) Act, 1972.
In 1973, the National Tiger Conservation Authority and Project Tiger were founded in India to gain public support for tiger conservation.
In Nepal and Bangladesh, the tiger has been protected since 1973.
Since 1976, the tiger has been totally protected under Malaysia's Protection of Wild Life Act.
Though tiger hunting was prohibited in China in 1977, the population continued to decline.
Since 1986, the tiger has been listed as Endangered on the IUCN Red List.
In Peninsular Malaysia, 8,315.7 km (3,210.7 sq mi) of tiger habitat was cleared during 1988–2012.
In China, the trade in tiger body parts was banned in 1993.
In Bhutan, the tiger has been enlisted as totally protected since 1995.
In 1999, the validity of several tiger subspecies was questioned due to distinctions based on fur length, coloration, striping patterns, and body size of specimens in natural history museum collections.
During the years 2000–2022, at least 3,377 tigers were confiscated in 2,205 seizures in 28 countries.
During 2001–2020, landscapes where tigers live declined from 1,025,488 km (395,943 sq mi) to 911,901 km (352,087 sq mi).
Seizure data from India during 2001–2021 indicate that tiger skins were the most often traded body parts.
A total of 292 illegal tiger parts were confiscated at US ports of entry from personal baggage, air cargo and mail between 2003 and 2012.
In 2003, Siegfried & Roy's act ended when a tiger attacked Roy during a performance.
Myanmar's national tiger conservation strategy developed in 2003 comprises management tasks such as restoration of degraded habitats, increasing the extent of protected areas and wildlife corridors, protecting tiger prey species, thwarting tiger killing and illegal trade of its body parts and promoting public awareness through wildlife education programmes.
In 2004, the tiger was voted the world's favourite animal with 21% of the vote in an online poll involving more than 50,000 people from 73 countries.
As of 2005, tiger classification used as the basis for tables.
Tiger populations in India have been targeted by poachers since the 1990s and were extirpated in two tiger reserves in 2005 and 2009.
Between 1935 and 2006, tiger attacks in the Sundarbans caused 1,396 human deaths, according to official records.
Between 2006 and 2018, efforts contributed to the recovery of India's tiger population so that it occurs in an area of about 138,200 km (53,400 sq mi).
Bhutan's first Tiger Action Plan implemented during 2006–2015 revolved around habitat conservation, human–wildlife conflict management, education and awareness.
As of 2009, the population density in a sampled area of roughly 3,250 km (1,250 sq mi) in northern Myanmar was estimated to be 0.21–0.44 tigers per 100 km (39 sq mi).
In 2009, the Bangladesh Tiger Action Plan was initiated to stabilise the country's tiger population, maintain habitat and a sufficient prey base, improve law enforcement and foster cooperation between governmental agencies responsible for tiger conservation.
In 2009, tigers were the most traded circus animals.
Tiger populations in India have been targeted by poachers since the 1990s and were extirpated in two tiger reserves in 2005 and 2009.
During 2010–2015 camera trapping in Jim Corbett National Park revealed a stable tiger population density of 12–17 individuals per 100 km (39 sq mi) in an area of 521 km (201 sq mi).
In 2010, anti-poaching operations were established in Nepal, marked by increased cooperation and intelligence sharing between agencies, contributing to the conservation of tigers.
Malaysia's Wildlife Conservation Act enacted in 2010 increased punishments for wildlife-related crimes.
The Thailand Tiger Action Plan ratified in 2010 envisioned increasing the country's tiger populations by 50% in the Western Forest Complex and Dong Phayayen–Khao Yai Forest Complex and reestablish populations in three potential landscapes until 2022.
In Nepal, between January 2011 and December 2015, seizure data obtained 585 pieces of tiger body parts and two whole carcasses in 19 districts.
From 2011 to 2014, there was an increase in anti-poaching patrol efforts in four Russian protected areas.
A total of 292 illegal tiger parts were confiscated at US ports of entry from personal baggage, air cargo and mail between 2003 and 2012.
In Peninsular Malaysia, 8,315.7 km (3,210.7 sq mi) of tiger habitat was cleared during 1988–2012.
In Thailand, four of 15 protected areas hosting tigers have not harboured tigers since about 2013.
Nam Et-Phou Louey National Park was considered the last important site for the tiger in Laos, but it has not been recorded there at least since 2013.
From 2011 to 2014, there was an increase in anti-poaching patrol efforts in four Russian protected areas.
In 2014, Panthera zdanskyi was suggested to be a sister species of the modern tiger.
In Nepal, between January 2011 and December 2015, seizure data obtained 585 pieces of tiger body parts and two whole carcasses in 19 districts.
Bhutan's first Tiger Action Plan implemented during 2006–2015 revolved around habitat conservation, human–wildlife conflict management, education and awareness.
During 2010–2015 camera trapping in Jim Corbett National Park revealed a stable tiger population density of 12–17 individuals per 100 km (39 sq mi) in an area of 521 km (201 sq mi).
In 2015, 34 poaching incidents were detected in Taman Negara, Malaysia before the establishment of anti-poaching patrols.
In 2015, a comprehensive analysis of morphological, ecological and mitochondrial DNA (mtDNA) traits reaffirmed the two-subspecies proposal for tigers.
Anti-poaching units in Sumatra's Kerinci Seblat landscape removed 362 tiger snare traps and seized 91 tiger skins during 2005–2016; annual poaching rates increased with rising skin prices.
As of 2016, population density was much lower in Mae Wong and Khlong Lan National Parks, estimated at only 0.359 tigers per 100 km (39 sq mi).
In 2016, 34 poaching incidents were detected in Taman Negara, Malaysia before the establishment of anti-poaching patrols.
Between March 2017 and January 2020, 630 hunter activities were discovered in a reserve forest of about 1,000 km (390 sq mi) in southern Myanmar.
In 2017, the Cat Classification Task Force of the IUCN Cat Specialist Group revised felid taxonomy and recognised only two tiger subspecies.
In 2017, the Cat Classification Task Force recognized the current classification of the tiger.
A 2018 study found the tiger to be the most popular wild animal based on surveys, as well as appearances on websites of major zoos and posters of some animated movies.
Between 2006 and 2018, efforts contributed to the recovery of India's tiger population so that it occurs in an area of about 138,200 km (53,400 sq mi).
By 2018, anti-poaching patrols in Taman Negara led to a decrease in poaching incidents to 20, along with the arrest of poaching teams and removal of snares, aiding tiger survival.
Data from the International Tiger Studbook 1938–2018 indicate that captive tigers lived up to 19 years.
In 2018, a whole-genome sequencing study of 32 samples from the six living putative subspecies of tigers found them to be distinct and separate clades.
In 2019, poaching and trafficking were declared to be moderate and serious crimes, increasing the legal consequences for these activities.
The Thai Wildlife Preservation and Protection Act was enacted in 2019 to combat poaching and trading of body parts.
Between March 2017 and January 2020, 630 hunter activities were discovered in a reserve forest of about 1,000 km (390 sq mi) in southern Myanmar.
As of 2020, India had the largest extent of global tiger habitat with 300,508 km (116,027 sq mi).
During 2001–2020, landscapes where tigers live declined from 1,025,488 km (395,943 sq mi) to 911,901 km (352,087 sq mi).
In 2020, only 6% of the captive tiger population in the United States was being housed in zoos and other facilities approved by the Association of Zoos and Aquariums.
In 2020, the captive tiger populations were over 8,000 in Asia, over 5,000 in the US, and no less than 850 in Europe.
The third strategic and action plan for the conservation of the Sumatran tiger for the years 2020–2030 revolves around strengthening management of small tiger population units of less than 20 mature individuals and connectivity between 13 forest patches in North Sumatra and West Sumatra provinces.
In 2021, the results of a 2018 whole-genome sequencing study of tiger subspecies were corroborated.
Seizure data from India during 2001–2021 indicate that tiger skins were the most often traded body parts.
As of 2022, the global tiger population is estimated to be 3,726–5,578 individuals.
As of 2022, the tiger inhabits less than 7% of its historical distribution.
During the years 2000–2022, at least 3,377 tigers were confiscated in 2,205 seizures in 28 countries.
In 2022, the keeping of tigers and other big cats by private people was banned in the US.
The Thailand Tiger Action Plan ratified in 2010 envisioned increasing the country's tiger populations by 50% in the Western Forest Complex and Dong Phayayen–Khao Yai Forest Complex and reestablish populations in three potential landscapes until 2022.
Up to 2022, 53 tiger reserves covering an area of 75,796 km (29,265 sq mi) have been established in India.
As of 2023, at least two subsequent studies considered P. zdanskyi likely to be a synonym of P. palaeosinensis.
Bhutan's second Action Plan aimed at increasing the country's tiger population by 20% until 2023 compared to 2015.
In 2023, the results of a 2018 whole-genome sequencing study of tiger subspecies were corroborated.
In Kazakhstan, tiger reintroduction is planned for 2025 in Ile-Balkash Nature Reserve, following habitat restoration and reintroduction of prey species.
The third strategic and action plan for the conservation of the Sumatran tiger for the years 2020–2030 revolves around strengthening management of small tiger population units of less than 20 mature individuals and connectivity between 13 forest patches in North Sumatra and West Sumatra provinces.