Why this chapter matters for UPSC: The monsoon, India's forest types and its protected areas are among the most examined parts of GS1 geography and GS3 environment. This chapter introduces all three: the seasons, the monsoon, natural vegetation and forests, and wildlife with its conservation. It was dropped from NCERT's rationalised 2023-24 edition, which ends with Chapter 6, "Our Country – India", and none of its content moved to another chapter. BharatNotes keeps it because the topics remain central to the syllabus.

Contemporary hook: The 2026 south-west monsoon season (June to September) ended with all-India rainfall of 87% of its long period average, or 759.4 mm: the 4th lowest since 2001 (IMD, 30 September 2026). By IMD's definition, anything below 90% of the long period average is "below normal". This chapter explains why a weak monsoon matters so much.

🧠 First Principles — Read This First

NCERT begins with the difference between weather and climate. Weather is the day-to-day change in the atmosphere: temperature, rainfall, sunshine, whether it is hot or cold, sunny or cloudy, windy or calm. Climate is the average weather condition measured over many years.

The chapter then builds one chain:

  • Climate. India's climate is described broadly as monsoon type. Because India lies in the tropical region, most of its rain is brought by monsoon winds, and its agriculture depends on that rain.
  • Natural vegetation. Grasses, shrubs and trees that grow on their own, without help from people, form natural vegetation. Which kind grows depends on the climate, and above all on the amount of rainfall.
  • Wildlife. Forests are the natural habitat of wildlife. Cutting forests and hunting have made many species decline, so the country has set up national parks, sanctuaries and biosphere reserves, and projects for the tiger and the elephant.

Climate shapes vegetation, and vegetation shelters wildlife. A change in one link, such as a failed monsoon or a felled forest, travels down the chain.

From climate to wildlifeA flowchart of the chapter's argument. India's climate is of the monsoon type: it lies in the tropics and monsoon winds bring most of its rain, about 74.9 per cent of it between June and September. Rainfall decides the forest: evergreen forests where rainfall is over 200 cm, deciduous forests at 70 to 200 cm, and thorn forests under 50 cm. Forests shelter wildlife such as the tiger, the Asiatic lion, the elephant and the one-horned rhino. Cutting and hunting have made many species decline and some extinct. The response is protection: 106 national parks and 573 wildlife sanctuaries as of November 2023, and 58 tiger reserves, under Project Tiger, which began in 1973.From climate to wildlifeClimate: monsoon typeIndia is tropical; monsoon winds bring most rainJune to September gives 74.9% of rain (IMD)Rainfall decides the forestEvergreen over 200 cm; deciduous 70–200 cm;thorn under 50 cm (NCERT Class XI)Forests shelter wildlifeTiger, Asiatic lion, elephant, one-horned rhinobutCutting and hunting cause declineMany species are declining; some are extinctsoProtection106 national parks, 573 sanctuaries (Nov 2023)58 tiger reserves; Project Tiger since 1973
The orange-edged box is the threat and the dark box the response. Sources: NCERT Class VI, ch. 8; IMD rainfall normal (1971–2020); NCERT Class XI, India: Physical Environment, ch. 5; PIB (3-Mar-2025 and 28-Jul-2026).

PART 1 — Quick Reference

India's Seasons

Season (NCERT)Months (NCERT)What happensIMD share of annual rainfall, 1971–2020 normal
Cold weather season (winter)December to FebruaryThe Sun's rays do not fall directly; temperatures are low in northern IndiaWinter (Jan–Feb): 3.4%
Hot weather season (summer)March to MayRays fall more or less directly; temperatures are very high; hot, dry winds called loo blow by dayPre-monsoon (Mar–May): 11.3%
South-west monsoon season (rainy)June to SeptemberMoist winds from the Arabian Sea and the Bay of Bengal blow towards the land; rain falls where they strike mountain barriersSouth-west monsoon (Jun–Sep): 74.9%
Season of retreating monsoons (autumn)October and NovemberWinds move back from the mainland to the Bay of Bengal; Tamil Nadu and Andhra Pradesh get rainPost-monsoon (Oct–Dec): 10.4%

IMD's rainfall seasons use slightly different months from NCERT's, so the shares in the last column follow IMD's months. IMD's all-India annual normal is 1,160.1 mm.

Key Figures (dated)

IndicatorFigureSource and date
Forest cover7,15,343 sq km, 21.76% of geographical areaISFR 2023 (PIB, 21-Dec-2024)
Forest and tree cover8,27,357 sq km, 25.17%ISFR 2023
Mangrove cover4,991.68 sq km, 0.15% of areaISFR 2023 (PIB, 21-Jul-2025)
Protected areas1,014: 106 national parks, 573 wildlife sanctuaries, 115 conservation reserves, 220 community reservesAs of 27-Nov-2023 (PIB, 3-Mar-2025)
Tiger reserves58 in 18 States, about 84,500 sq km; newest: Madhav (Madhya Pradesh)PIB, 7-Apr-2026 and 28-Jul-2026
Tigers3,682 (average estimate), 3,167 (minimum), 3,925 (upper limit)All India Tiger Estimation 2022 (PIB, 29-Jul-2023)
Asiatic lions891 in 2025, up from 674 in 2020PIB, 5-Feb-2026
Ramsar sites101 (Glaw Lake, Arunachal Pradesh, the 101st)Akashvani, 4-Aug-2026
Biodiversity hotspots4 of the world's 36: Himalaya, Western Ghats, Indo-Burma, SundalandPIB, 9-Oct-2025
SpeciesOver 96,000 animal and 47,000 plant speciesPIB, 7-Apr-2026

PART 2 — Concepts & Narrative

Weather, Climate and the Monsoon

Key Term

Weather: the day-to-day changes in the atmosphere, including temperature, rainfall and sunshine.

Climate: the average weather condition, measured over many years.

Monsoon: from the Arabic word "mausim", meaning seasons. India's climate is broadly of the monsoon type: because India lies in the tropical region, most of its rain is brought by monsoon winds. Good monsoons mean adequate rain and a bountiful crop.

Loo: the hot and dry wind that blows during the day in the hot weather season.

What controls a place's climate. NCERT names four factors: location, altitude, distance from the sea and relief. That is why India's climate varies so much:

  • Jaisalmer and Bikaner in the Rajasthan desert are very hot, while Drass and Kargil are freezing cold. (NCERT places them in Jammu and Kashmir; since the Jammu and Kashmir Reorganisation Act, 2019 they lie in the Union Territory of Ladakh, formed from Kargil and Leh districts.)
  • Coastal places such as Mumbai and Kolkata have a moderate climate, neither too hot nor too cold, and are very humid.
  • Mawsynram in Meghalaya receives the world's highest rainfall (NCERT), while in some years it may not rain at all in Jaisalmer. NCERT Class XI puts the numbers: Cherrapunji and Mawsynram receive over 1,080 cm a year, while Jaisalmer rarely gets more than 9 cm.
Explainer

The monsoon calendar and how IMD grades a season

  • Normal dates (IMD, in use since 1 June 2020): the monsoon sets in over Kerala on 1 June. It reaches extreme north-west India by 8 July (earlier than the old date of 15 July). Its final withdrawal from south India is on 15 October. NCERT Class XI adds that the "burst" may come in the first week of June on the coasts of Kerala, Karnataka, Goa and Maharashtra, and as late as the first week of July in the interior.
  • How a season is graded (IMD FAQ): for the country as a whole, rainfall within 90–110% of the long period average (LPA) is normal; below 90% is below normal; above 110% is above normal.
  • Recent seasons (IMD end-of-season reports): 2019: 110% of LPA. 2023: 94% (within the normal band, though below the average). 2026: 87%, below normal. In 2026 the south peninsula received 76% and north-east India 74% of their LPAs.

Why a weak monsoon hurts. NCERT asks what would happen if the monsoon were weak or failed in a year: crops would be affected, the water level in wells would go down, and summer would feel longer. With about three-quarters of India's rain arriving between June and September (IMD), the whole year's water depends on those four months.

Natural Vegetation

Key Term

Natural vegetation: grasses, shrubs and trees that grow on their own, without interference or help from human beings. Different types depend on different climatic conditions, among which the amount of rainfall is the most important. Because India's climate varies, it has a wide range of natural vegetation.

NCERT Class XI divides India's forests into five groups, and its rainfall limits make the link to climate exact:

Forest type (NCERT Class XI)Where and how much rain
Tropical evergreen and semi-evergreenOver 200 cm a year, mean temperature above 22 °C: western slopes of the Western Ghats, hills of the north-east, Andaman and Nicobar Islands
Tropical deciduous (monsoon forests; the most widespread)70–200 cm; moist deciduous where rainfall is 100–200 cm
Tropical thornLess than 50 cm: semi-arid south-west Punjab, Haryana, Rajasthan, Gujarat, Madhya Pradesh, Uttar Pradesh
MontaneChanges with altitude in the Himalaya and the southern hills
Littoral and swamp (including mangroves)Coasts: salt marshes, tidal creeks, mud flats and estuaries

Why forests are necessary (NCERT). Plants release the oxygen we breathe and absorb carbon dioxide. Their roots bind the soil and control erosion. Forests give timber, fuelwood, fodder, medicinal plants and herbs, lac, honey and gum, and they are the natural habitat of wildlife. Reckless cutting has destroyed much natural vegetation, so NCERT asks us to plant and protect trees, through programmes such as Van Mahotsav. Its example is Leela, whose parents planted a neem sapling at her birth and a new sapling on every birthday: by the time she was 20, twenty-one trees stood around her house.

UPSC Connect

India's forests: the latest count

The India State of Forest Report (ISFR) is published every two years by the Forest Survey of India. ISFR 2023 was released on 21 December 2024 (PIB):

  • Forest cover 7,15,343 sq km (21.76%); tree cover 1,12,014 sq km (3.41%); together 8,27,357 sq km (25.17%).
  • Carbon stock in forests: 7,285.5 million tonnes, up 81.5 million tonnes from the 2021 assessment.
  • Largest forest cover by area: Madhya Pradesh (77,073 sq km), Arunachal Pradesh, Chhattisgarh. Highest share of area: Lakshadweep (91.33%), Mizoram (85.34%), Andaman and Nicobar Islands (81.62%).
  • Mangrove cover: 4,991.68 sq km.

The target: India's forest policy, adopted in 1952 and modified in 1988, aims to bring 33% of the geographical area under forest cover (NCERT Class XI). Forest and tree cover together stand at 25.17%.

The global view: the FAO's Global Forest Resources Assessment 2025, released on 22 October 2025, ranks India 9th in the world by forest area and 3rd in net annual gain of forest area (PIB, 24-Oct-2025). FAO's forest area (about 72.7 million hectares) is measured differently from ISFR's forest cover, so the two figures are not compared directly.

As of October 2026, ISFR 2023 remains the latest edition on the Forest Survey of India's website.

Wildlife

NCERT's tour of India's wildlife:

  • The tiger is our national animal and is found in various parts of the country. The Gir forest in Gujarat is the home of the Asiatic lion.
  • Elephants and one-horned rhinoceroses roam the forests of Assam; elephants are also found in Kerala and Karnataka.
  • Camels live in the Great Indian Desert and wild asses in the Rann of Kachchh.
  • Wild goats, snow leopards and bears live in the Himalayan region.
  • Others: monkey, wolf, jackal, nilgai, cheetal. Several hundred species of snakes, among which cobras and kraits are important.
  • The peacock is our national bird. Bird sanctuaries give birds their natural habitat and protect them from hunters.

Why wildlife is declining, and what is being done. Cutting forests and hunting have made several species decline rapidly, and many have become extinct. To protect them, India has set up national parks, sanctuaries and biosphere reserves and started Project Tiger and Project Elephant. Each of us can help by refusing to buy things made from animal bones, horns, fur, skins and feathers. Wildlife Week is observed in the first week of October.

Note

Migratory birds (NCERT). Some birds, such as the pintail duck, curlew, flamingo, osprey and little stint, migrate to India every winter. The little stint, the smallest of them at as little as 15 grams, travels over 8,000 km from the Arctic region to reach India.

UPSC Connect

Conservation today (dated, from Government of India sources)

Project Tiger. Launched in 1973 with nine tiger reserves covering 18,278 sq km (PIB, 29-Jul-2023). India now has 58 tiger reserves in 18 States covering about 84,500 sq km (PIB, 28-Jul-2026); the newest is Madhav in Madhya Pradesh (PIB, 7-Apr-2026). The Royal Bengal tiger was declared the National Animal in 1972 (PIB, 28-Jul-2026).

  • All India Tiger Estimation 2022: a minimum of 3,167 tigers in camera-trapped areas; with the other tiger areas added, an upper limit of 3,925 and an average of 3,682. Madhya Pradesh had the most (785), followed by Karnataka (563), Uttarakhand (560) and Maharashtra (444) (PIB, 29-Jul-2023). The sixth cycle of the estimation has begun (PIB, 7-Apr-2026).
  • India's share of wild tigers: "almost 75%" in PIB's 2023 release; "nearly 70%" in its 2026 backgrounder.

Project Elephant. Elephant reserves rose from 26 in 2014 to 33 in 2025, with 150 elephant corridors across 15 States (PIB, 7-Apr-2026).

Asiatic lion. The population rose from 674 in 2020 to 891 in 2025, and lions now also live in new areas such as river corridors and revenue wastelands; Barda Wildlife Sanctuary has been developed as a second home (PIB, 5-Feb-2026). Project Lion was announced on 15 August 2020, and the Environment Ministry has approved a 10-year project of ₹2,927.71 crore (PIB, 10-Aug-2025). The Asiatic lion is Endangered on the IUCN Red List, moved up from Critically Endangered in 2008 (PIB, 13-Feb-2025).

Snow leopard. India's first nationwide assessment (2019–2023) estimated 718: 477 in Ladakh and 124 in Uttarakhand (PIB, 7-Apr-2026).

Project Dolphin. Launched on 15 August 2020 for marine and river dolphins (PIB, 3-Mar-2025). A 2021–2023 survey estimated 6,327 river dolphins, and a second range-wide estimation began in January 2026 (PIB, 7-Apr-2026).

Project Cheetah. Eight cheetahs from Namibia were brought to Kuno National Park in September 2022, and twelve from South Africa in February 2023 (PIB, 3-Mar-2025). In 2025 cheetahs were also introduced into Gandhi Sagar Wildlife Sanctuary; as of December 2025 the population was 30, including 19 cubs born in India (PIB, 7-Apr-2026).

Great Indian Bustard. On 19 April 2021 the Supreme Court restrained overhead power lines in the bird's habitat. In M.K. Ranjitsinh v. Union of India (21 March 2024) it recalled that injunction for the priority and potential areas, subject to an Expert Committee that is to assess where lines can go underground.

Wetlands. India had 98 Ramsar sites on 31 January 2026, up from 26 in 2014: the most in Asia and the third-largest number in the world (PIB, 7-Apr-2026). Glaw Lake in Arunachal Pradesh, the State's first, became the 101st (Akashvani, 4-Aug-2026).

Biosphere reserves. India has 18 notified biosphere reserves (PIB, 7-Apr-2026).

PART 3 — UPSC Integration

The chapter's chain of climate, vegetation and wildlife runs through both GS1 and GS3. The monsoon decides kharif sowing, reservoir levels and food prices, so a season like 2026's (87% of LPA) is an economic story as much as a weather one. Rainfall decides where each forest type grows, which is why Mains questions on the diversity of India's vegetation begin with rainfall and relief. The protected-area network, from tiger reserves to Ramsar sites, connects to forest rights, human-wildlife conflict and India's commitments on biodiversity. When writing an answer, pair a mechanism (why the monsoon or a forest type is where it is) with a dated figure from the tables above.

Exam Strategy

Prelims traps:

  • Climate vs weather: weather is day-to-day; climate is the average over many years.
  • NCERT's seasons vs IMD's: NCERT's winter is December to February and its retreating monsoon October and November; IMD's rainfall seasons are January–February and October–December.
  • 74.9%, not 80%: the share of annual rainfall that falls in June–September (IMD, 1971–2020).
  • "Normal" monsoon = 90–110% of LPA. 2023 (94%) was normal; 2026 (87%) was below normal.
  • Forest cover 21.76% vs forest and tree cover 25.17%; the policy target is 33%.
  • Tiger estimate: 3,682 is the average; 3,167 the camera-trap minimum.
  • Project Tiger 1973; Project Lion and Project Dolphin 15 August 2020.
  • Asiatic lion: only in Gujarat's Gir landscape, now also Barda; IUCN Endangered.
  • The tiger was declared National Animal in 1972, a year before Project Tiger began.

Mains angle: Link the monsoon to agriculture and water security with dated IMD figures; explain forest types by rainfall; assess conservation programmes with their latest official numbers.

Practice Questions

Practice (UPSC-pattern, not past papers). Real UPSC questions on this chapter are listed in the PYQ box above.

Prelims:

  1. According to IMD, the south-west monsoon season brings about what share of India's annual rainfall (1971–2020 normal)?
    (a) About 50%
    (b) About 75%
    (c) About 90%
    (d) About 60%

  2. For the country as a whole, IMD calls the monsoon season "normal" when rainfall is:
    (a) exactly 100% of the long period average
    (b) between 90% and 110% of the long period average
    (c) above 95% of the long period average
    (d) between 80% and 120% of the long period average

  3. Tropical thorn forests occur in areas receiving annual rainfall of:
    (a) less than 50 cm
    (b) 70–100 cm
    (c) 100–200 cm
    (d) over 200 cm

  4. As per ISFR 2023, which State has the largest forest cover by area?
    (a) Arunachal Pradesh
    (b) Chhattisgarh
    (c) Madhya Pradesh
    (d) Odisha

  5. Consider the following pairs:

    1. Project Tiger : 1973
    2. Project Lion : announced 15 August 2020
    3. Project Dolphin : launched 15 August 2020
      How many of the pairs given above are correctly matched?
      (a) Only one
      (b) Only two
      (c) All three
      (d) None

  6. According to NCERT, which of the following are found in the Rann of Kachchh?
    (a) Snow leopards
    (b) Wild asses
    (c) One-horned rhinoceroses
    (d) Asiatic lions

Mains:

  1. "The Indian monsoon is a gamble on rains." Explain the variability of the monsoon using IMD's classification of seasons, and discuss its consequences for agriculture. (150 words)

  2. Discuss how rainfall explains the distribution of forest types in India, and assess how far India is from its forest-cover target. (150 words)

📦 Revision Capsule

Revision Capsule

Hard Facts

  • Seasons (NCERT): cold weather Dec–Feb, hot weather Mar–May (loo), south-west monsoon Jun–Sep, retreating monsoon Oct–Nov (rain in Tamil Nadu and Andhra Pradesh).
  • Monsoon from Arabic mausim; onset over Kerala 1 June (IMD); June–September = 74.9% of annual rain; 2026 season 87% of LPA.
  • Climate factors: location, altitude, distance from the sea, relief. Mawsynram wettest; Jaisalmer driest.
  • Forests (ISFR 2023): forest cover 21.76%; with trees 25.17%; target 33%; MP largest by area.
  • Wildlife: tiger national animal (declared 1972), peacock national bird; lions in Gir (891 in 2025); 58 tiger reserves; 101 Ramsar sites.

Core Concepts

  • Climate → natural vegetation → wildlife.
  • Rainfall decides forest type (evergreen > 200 cm; deciduous 70–200 cm; thorn < 50 cm).
  • Deforestation and hunting → decline → protected areas and species projects.

Confused Pairs

  • Weather (day-to-day) vs climate (long-term average)
  • Forest cover (21.76%) vs forest and tree cover (25.17%)
  • National park vs wildlife sanctuary vs biosphere reserve (106, 573 and 18)
  • Project Tiger (1973) vs Project Lion (2020)

PYQ Pattern

  • Mains GS1 asks about monsoon climate and its variability (2015, 2017, 2023), the diversity of natural vegetation and wildlife sanctuaries (2023), forest resources (2020) and mangroves (2019); GS3 asked about Ramsar wetlands (2018). See the PYQ box.

Sources

Sources