Current Affairs · · GS3 · Environment

Why Buxa chose Valmiki and soft release for its tiger return

Tigress T138, moved from Valmiki Tiger Reserve to Buxa, left her acclimatisation enclosure on 4 October 2026 and is now tracked by satellite collar. Valmiki was chosen because its terrain and prey resemble Buxa’s. India’s record of tiger reintroduction includes clear successes at Sariska and Panna, and a failure at Satkosia that shows what can go wrong.

Event date:

REq1
  1. Context1 / 5
    • T138, a three-year-old tigress moved from Valmiki Tiger Reserve in Bihar, was placed in a soft-release enclosure at Buxa Tiger Reserve, West Bengal, on 2 October 2026.
    • On 4 October she left the enclosure and entered the wider forest. She has been fitted with a satellite collar.
    • Officials say more tigers have been identified for later release, depending on how T138 and the habitat respond.
    • Four questions follow from the move: why Buxa needs tigers back, why Valmiki was chosen as the donor reserve, how the release itself works, and what India's earlier attempts teach.
  2. Note2 / 5

    Why Buxa, and why Valmiki?

    • Why Buxa. The reserve has forest habitat and links to the Manas landscape in Assam and Phibsoo in Bhutan, which allow natural movement and the flow of genes. Prey has been rebuilt by releasing chital and restoring grassland since 2018.
    • Why Valmiki. It lies at the eastern end of the Terai Arc Landscape, with a mix of hills and plains, and a prey base comparable in several respects to Buxa's. A tiger from a similar habitat is more likely to settle.
    • Why not the Sundarbans. West Bengal's other tigers live in tidal mangroves. Their adaptation to that unusual habitat makes them a poorer match for Buxa's terrestrial forest.
    • The scientific basis. Under NTCA guidelines, the choice of a donor reserve weighs the health and genetics of the animal, the donor population's ability to spare it, and how closely the two habitats match.
  3. Key concepts3 / 5

    1. What is a soft release?

    The animal is first kept in a fenced enclosure inside its new habitat, with water and natural cover, so that it can adjust to unfamiliar sights, sounds and smells before roaming freely. A hard release sets the animal free at once. A soft release lowers the chance that a stressed animal wanders far, or into villages.

    2. How is the tigress tracked?

    Satellite telemetry records her movement, home range and use of habitat. Camera traps confirm identity and record encounters with other wildlife. Field teams check her health, her hunting, and any contact with people or livestock.

    3. What counts as success?

    Not the number of animals released, but whether a tiger sets up a territory, breeds, and raises cubs that survive, and whether young tigers later disperse and connect with neighbouring populations. A population that can sustain itself is the goal.

  4. Note4 / 5

    Lessons from India's earlier reintroductions

    The table below compares three cases.

    ReserveWhenWhat happenedThe lesson
    Sariska, RajasthanFrom 2008Tigers flown in after local extinction; slow early years, and later a breeding populationRecovery takes years, and early results can mislead
    Panna, Madhya PradeshFrom 2009Breeding population restored after local extinctionProtection, with prey and monitoring, can rebuild a population
    Satkosia, Odisha2018India's first inter-State translocation; the male was killed by a poacher's snare, the female attacked people and was removed, and the project was suspendedPrey, protection and community trust must come first
    • What went wrong at Satkosia. Villages lay close to the core area, prey was limited, and engagement with local communities was weak. The NTCA also said the tigress had not been managed according to its standard operating procedure.
    • Why this matters for Buxa. Buxa is surrounded by settlements, tea gardens and forest villages, and by roads and railways, so the same risks are present there.
  5. Way forward5 / 5

    These are suggested measures, not approved policy.

    • Release further tigers only after reviewing how T138 settles, what she hunts, and whether any conflict arises.
    • Keep communities on side through prompt compensation for livestock losses, early warnings, and a share in the benefits of tourism.
    • Make any relocation voluntary and rights-based, in line with the Forest Rights Act, 2006.
    • Protect the corridors to Manas and Bhutan from fragmentation by linear infrastructure.

Sources

Syllabus

PaperSubjectSub-topic
GS3EnvironmentConservation; human-wildlife conflict; protected-area management
PrelimsEnvironmentTiger reserves; NTCA; reintroduction and translocation

Topics

BiodiversityEnvironmental Laws, Conventions and PoliciesProtected Areas and ConservationSpecies

Related previous-year questions

Asked in earlier UPSC Prelims papers on this topic. Answer, then check.

  1. UPSC Prelims 2017 · Environment and Ecology · Biodiversity

    The term ‘M-STrIPES’ is sometimes seen in the news in the context of

    1. Captive breeding of Wild Fauna
    2. Maintenance of Tiger Reserves
    3. Indigenous Satellite Navigation System
    4. Security of National Highways
    Show answer

    Answer: B. VERDICT: The answer is maintenance of Tiger Reserves. M-STrIPES is a tiger monitoring system. ANALYSIS: Monitoring System for Tigers, Intensive Protection and Ecological Status is a software based monitoring system launched in 2010 in tiger reserves to reduce the vulnerability of tigers. It enables field managers to record and assess the intensity and spatial coverage of patrols within a geographic information system, so that anti poaching effort can be directed where cover is thin. It has nothing to do with captive breeding, satellite navigation or highway security. SOURCE: Press reporting on the deployment of M-STrIPES in tiger reserves. Source type EN. HOW TO CRACK IT: Expand the acronym, since the capital letters spell out Monitoring System for Tigers, and the answer is contained in the expansion. Government and conservation acronyms in India are usually constructed backwards from a memorable word, which makes expansion both possible and decisive. Note the reusable pairing too: M-STrIPES goes with the National Tiger Conservation Authority and with the four yearly all India tiger estimation, so the three surface together.

    Difficulty: medium · direct

    Open this question on its own page, with the full explanation →

  2. UPSC Prelims 2020 · Environment and Ecology · Protected Areas and Conservation

    Among the following Tiger Reserves, which one has the largest area under 'Critical Tiger Habitat'?

    1. Corbett
    2. Ranthambore
    3. Nagarjunsagar-Srisailam
    4. Sunderbans
    Show answer

    Answer: C. Critical 'tiger' habitats (CTHs), also known as core areas of tiger reserves, are identified under the Wild Life Protection Act (WLPA), 1972 based on scientific evidence that 'such areas are required to be kept as inviolate for the purpose of tiger conservation, without affecting the rights of the Scheduled Tribes or such other forest dwellers'. The notification of CTH is done by the state government in consultation with the expert committee constituted for the purpose. Nagarjunsagar-Srisailam Tiger Reserve is the largest tiger reserve in India. The reserve spreads over five districts — Kurnool District, Prakasam District, Guntur District, Nalgonda District and Mahbubnagar district. The total area of the tiger reserve is 3,728 km2 (1,439 sq mi). Being the largest tiger reserve, Nagarjunsagar-Srisailam also has the largest area under Critical Tiger Habitat. Hence option (c) — Nagarjunsagar-Srisailam — is the correct answer.

    Difficulty: medium · direct

    Open this question on its own page, with the full explanation →

  3. UPSC Prelims 2012 · Environment and Ecology · Protected Areas and Conservation

    Consider the following protected areas: 1. Bandipur 2. Bhitarkanika 3. Manas 4. Sundarbans Which of the above are declared Tiger Reserves?

    1. 1 and 2 only
    2. 1, 3 and 4 only
    3. 2, 3 and 4 only
    4. 1, 2, 3 and 4
    Show answer

    Answer: B. Correct Answer: 1, 3 and 4 only Bandipur, Manas and Sundarbans are Tiger Reserves under Project Tiger. Bhitarkanika is an important protected area, but it is not a Tiger Reserve. Statement-wise Explanation 1. Bandipur — Correct Bandipur in Karnataka is a Tiger Reserve. It was one of the original tiger reserves included under Project Tiger in 1973 and forms part of the Nilgiri Biosphere Reserve. 2. Bhitarkanika — Incorrect Bhitarkanika in Odisha is not a Tiger Reserve. It is a National Park, Wildlife Sanctuary and Ramsar wetland, best known for mangroves and saltwater crocodile conservation. 3. Manas — Correct Manas in Assam is a Tiger Reserve. It is also a UNESCO World Heritage Site, Biosphere Reserve and Elephant Reserve, known for rich biodiversity in the Himalayan foothills. 4. Sundarbans — Correct Sundarbans in West Bengal is a Tiger Reserve. It is the world’s largest mangrove forest and is famous for Royal Bengal Tigers adapted to the mangrove ecosystem. Extra UPSC Info * Project Tiger was launched in 1973 to conserve tiger populations and their habitats. * The National Tiger Conservation Authority is the statutory body responsible for tiger conservation in India. * Tiger Reserves have core areas for strict protection and buffer areas for regulated human activity. * Bhitarkanika should be remembered for mangroves, Ramsar status and saltwater crocodiles, not tigers. * Sundarbans is important for mangrove ecology, estuarine biodiversity and human-wildlife conflict issues. Final Takeaway Bandipur, Manas and Sundarbans are Tiger Reserves, while Bhitarkanika is not; hence the correct answer is 1, 3 and 4 only.

    Difficulty: medium · statement

    Open this question on its own page, with the full explanation →

Practice questions

  1. With reference to tiger reintroduction in India, consider the following statements: 1. Sariska and Panna tiger reserves had tigers reintroduced after local extinction. 2. Satkosia Tiger Reserve saw India's first inter-State tiger translocation. 3. A soft release means the animal is set free immediately without an enclosure. Which of the statements given above are correct?

    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
    Show answer

    Answer: A. Statements 1 and 2 are correct. Statement 3 describes a hard release: in a soft release the animal is first held in a fenced enclosure within the new habitat, so that it can acclimatise before moving freely, which reduces the risk that a stressed animal strays into villages.

    Difficulty: medium · statement

  2. Consider the following statements: 1. Valmiki Tiger Reserve is in Bihar. 2. Valmiki lies within the Terai Arc Landscape. 3. Buxa Tiger Reserve's tigers were brought from the Sundarbans. Which of the statements given above are correct?

    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
    Show answer

    Answer: A. Statements 1 and 2 are correct. Statement 3 is wrong: T138 was brought from Valmiki, in Bihar. Tigers in the Sundarbans are adapted to tidal mangrove country, which makes them a poor match for the terrestrial forest of Buxa, so habitat similarity rather than proximity decided the choice.

    Difficulty: medium · statement

Mains practice

Answer-writing practice on this article. Attempt it first, then open the hints.

  1. GS3 · 250 words

    Tiger reintroduction in India has produced both successes and failures. Examine the factors that decide the outcome, with reference to Sariska, Panna, Satkosia and Buxa.

    Show hints
    1. Begin with the choice of donor animal and reserve, and why habitat similarity matters more than geographic proximity.
    2. Explain the release method itself, contrasting an acclimatisation enclosure with immediate release, and the monitoring that follows through telemetry, camera traps and field teams.
    3. Set prey and protection as the precondition, using Sariska and Panna to show what recovery looks like when both are in place.
    4. Use Satkosia to show the failure mode, with villages close to the core, limited prey and a protocol not followed, and draw from it that community trust is decisive through compensation, early warning and rights-based relocation.
    5. Conclude on time horizons and connectivity, since breeding, cub survival and dispersal into neighbouring landscapes take years to judge.