Endangered Species and the IUCN Red List: Categories and PYQs
Notes on endangered species for competitive exams: the nine IUCN Red List categories, threatened Indian species and habitats, wildlife laws and recovery projects.
By GK24 Editorial Team· Published · 4 min read

Every environment and ecology paper carries at least one question about species that are close to disappearing and about the list that records how close they are. The IUCN Red List is the world's accepted register of the conservation status of plants and animals, while India shields its own threatened wildlife through the Wildlife (Protection) Act, 1972 and a line of species recovery projects. This note puts the whole topic in one place: how the Red List works, what each of its categories means, which Indian species sit in the threatened grades, where they survive, and which laws and international conventions protect them.
The IUCN and its Red List
The International Union for Conservation of Nature was founded in 1948 and works from its headquarters at Gland in Switzerland. It began the Red List of Threatened Species in 1964, and the list is today the most widely used measure of extinction risk. The volumes in which these assessments are published are popularly called the Red Data Book. A species is judged on the size of its population, the speed at which that population is falling, the area it occupies and the threats it faces, and is then placed in one of nine categories. An assessment is a statement of risk, not a legal order; the protection itself comes from national laws such as the Indian Act of 1972.
The nine Red List categories
| Category | Code | What it means |
|---|---|---|
| Extinct | EX | No individual of the species is left anywhere |
| Extinct in the Wild | EW | Survives only in captivity or cultivation |
| Critically Endangered | CR | Extremely high risk of extinction in the wild |
| Endangered | EN | Very high risk of extinction in the wild |
| Vulnerable | VU | High risk of extinction in the wild |
| Near Threatened | NT | Close to qualifying for a threatened grade |
| Least Concern | LC | Widespread and abundant |
| Data Deficient | DD | Information is not enough to judge the risk |
| Not Evaluated | NE | The species has not yet been assessed |
The three grades Critically Endangered, Endangered and Vulnerable are together called threatened species. Remember the order of severity from Extinct down to Least Concern; a common trap is to call Near Threatened a threatened category, which it is not.
Why species become endangered
- Loss and fragmentation of habitat by farming, mining, dams, roads and townships.
- Poaching and the illegal trade in skins, horn, ivory, bone and live pets.
- Pollution and poisoning; the veterinary drug diclofenac, banned for animal use in India in 2006, wiped out most of the country's vultures.
- Invasive alien species such as lantana and water hyacinth that crowd out native plants.
- Overfishing, overgrazing and the collection of medicinal plants beyond recovery.
- Climate change, which shifts the belts of snow, rain and forest that a species depends on.
India's legal shield
The Wildlife (Protection) Act, 1972 is the backbone. It lists protected species in schedules, and Schedule I carries the highest protection with the strictest punishment; the tiger, the Asiatic lion, the greater one-horned rhinoceros, the snow leopard, the Indian wild ass and the great Indian bustard are all Schedule I animals. The Act also provides for national parks, wildlife sanctuaries and the Central Zoo Authority. Around it stand the Forest (Conservation) Act, 1980, which stops forest land from being diverted without clearance, and the Biological Diversity Act, 2002, under which the National Biodiversity Authority works from Chennai.
Species recovery projects
| Project | Launched | Species |
|---|---|---|
| Project Tiger | 1973 | Tiger, through tiger reserves |
| Crocodile Conservation Project | 1975 | Gharial, mugger and saltwater crocodile |
| Project Elephant | 1992 | Asian elephant and its corridors |
| Project Snow Leopard | 2009 | Snow leopard of the high Himalaya |
Project Tiger began in 1973 with Jim Corbett National Park among its first reserves, and the tiger was adopted as India's national animal in the same period. The elephant was declared the National Heritage Animal in 2010 and the Gangetic river dolphin the National Aquatic Animal in 2009. The National Tiger Conservation Authority, created by the 2006 amendment to the Act of 1972, supervises the tiger reserves.
Where India's threatened species survive
| Species | Stronghold |
|---|---|
| Asiatic lion | Gir National Park, Gujarat |
| Greater one-horned rhinoceros | Kaziranga, Assam |
| Indian wild ass | Wild Ass Sanctuary, Little Rann of Kachchh |
| Hangul or Kashmir stag | Dachigam National Park |
| Lion-tailed macaque | Silent Valley National Park, Kerala |
| Nilgiri tahr | Eravikulam National Park, Kerala |
| Great Indian bustard | Desert National Park, Rajasthan |
| Snow leopard | Hemis National Park, Ladakh |
| Olive ridley turtle | Gahirmatha coast, Odisha |
| Red panda | Singalila and Khangchendzonga, eastern Himalaya |
India has also lost species. The Asiatic cheetah was declared extinct in the country in 1952, and the pink-headed duck has not been recorded in the wild since the 1940s.
The international framework
The Convention on International Trade in Endangered Species of Wild Fauna and Flora, known as CITES, was signed at Washington in 1973 and came into force in 1975; its Appendix I bans commercial trade in the most threatened species. The Convention on Migratory Species, or Bonn Convention, was adopted in 1979. The Ramsar Convention on wetlands was signed at Ramsar in Iran in 1971, and the Convention on Biological Diversity was opened at the Rio Earth Summit in 1992. Among the Sustainable Development Goals, SDG 15 is Life on Land, which seeks to halt biodiversity loss, while SDG 14 is Life Below Water.
Exam Point of View
Examiners test four things from this topic. First, the Red List categories in order and the fact that only CR, EN and VU count as threatened. Second, species and habitat pairs: the wild ass with the Rann of Kachchh, the hangul with Dachigam, the lion-tailed macaque with Silent Valley, the Asiatic lion with Gir. Third, the years of the projects and Acts, where Project Tiger 1973 and Project Elephant 1992 are asked again and again, along with Schedule I of the 1972 Act. Fourth, the conventions and their cities, where CITES 1973 at Washington and Ramsar 1971 in Iran are the usual traps because candidates confuse the signing year with the year the convention came into force.
Important Facts
| IUCN founded | 1948, headquarters at Gland, Switzerland |
|---|---|
| Red List started | 1964; the published volumes are the Red Data Book |
| Red List categories | Nine, from Extinct to Not Evaluated |
| Threatened grades | Critically Endangered, Endangered and Vulnerable |
| Highest legal protection in India | Schedule I of the Wildlife (Protection) Act, 1972 |
| Project Tiger | Launched in 1973 |
| Project Elephant | Launched in 1992 |
| CITES | Signed at Washington in 1973, in force from 1975 |
| Cheetah | Declared extinct in India in 1952 |
| National Aquatic Animal | Gangetic river dolphin, declared in 2009 |
| National Heritage Animal | Elephant, declared in 2010 |
| SDG for land and biodiversity | SDG 15, Life on Land |
Practice MCQs on this topic
After Wildlife Protection Act in 1972, the name of India's first wildlife conservation project was
- A.Gir
- B.Tiger
- C.rhino
- D.Hangul
Show answer
Correct answer: B. Tiger
Explanation
The correct answer is B, Tiger. Project Tiger was launched in 1973, the year after the Wildlife (Protection) Act came into force, and it was the first species recovery project of its kind in India. It began with a small group of reserves, Jim Corbett among them, and works on the principle of a strictly protected core area surrounded by a buffer in which regulated use is allowed. Option A is wrong because Gir is the forest in Gujarat that shelters the Asiatic lion and is a national park, not the name of a national project. Option C is wrong because the rhino programme, aimed at the greater one-horned rhinoceros of Assam and Bengal, came much later than 1973. Option D is wrong because the hangul, the Kashmir stag of Dachigam, has its own state level recovery effort and was never the first national project.
The International Union for Conservation of Nature, which publishes the Red List of Threatened Species, has its headquarters in which country?
- A.India
- B.Switzerland
- C.Kenya
- D.United States of America
Show answer
Correct answer: B. Switzerland
Explanation
The correct answer is B, Switzerland. The International Union for Conservation of Nature was founded in 1948 and works from Gland, a town in Switzerland near Geneva, where several environmental bodies have their offices. It began the Red List of Threatened Species in 1964 and remains its keeper. Option A is wrong because India is a member state of the union and hosts its country office, but the world headquarters was never here. Option C is wrong because Nairobi in Kenya is the headquarters of the United Nations Environment Programme, a different body that candidates often confuse with the IUCN. Option D is wrong because no principal organ of the IUCN sits in the United States; Washington is remembered in this topic for the signing of CITES in 1973, not for the union itself.
The greater one-horned rhino is listed under the Schedule ______ of the Wildlife Protection Act, 1972.
- A.II
- B.IV
- C.III
- D.I
Show answer
Correct answer: D. I
Explanation
The correct answer is D, Schedule I. The greater one-horned rhinoceros, the animal of Kaziranga and Manas in Assam, is placed in Schedule I of the Wildlife (Protection) Act, 1972, the schedule that carries the highest protection and the strictest punishment for hunting or trade. The tiger, the Asiatic lion, the snow leopard, the Indian wild ass and the great Indian bustard sit in the same schedule. Options A and C are wrong because the lower schedules were meant for animals that need protection but not of the highest order, and no big mammal under such heavy poaching pressure would be left there. Option B is wrong for the same reason. In the exam, remember the simple rule that the most threatened and most poached animals of India are Schedule I species.
Which of the following IUCN Red List categories indicates a lower level of extinction risk than Endangered?
- A.Critically Endangered
- B.Vulnerable
- C.Extinct in the Wild
- D.Extinct
Show answer
Correct answer: B. Vulnerable
Explanation
The correct answer is B, Vulnerable. The Red List arranges risk in a ladder, and the three threatened grades in falling order of severity are Critically Endangered, Endangered and Vulnerable. A Vulnerable species therefore faces a high risk of extinction in the wild, but a smaller risk than an Endangered one. Option A is wrong because Critically Endangered is the grade above Endangered, meaning an extremely high risk and the last step before a species is lost from the wild. Option C is wrong because Extinct in the Wild describes a species that survives only in captivity or cultivation, which is worse than any threatened grade. Option D is wrong because Extinct is the end of the ladder, with no individual left anywhere. Learn the ladder once and this family of questions becomes free marks.
Which of the following is declared as a Wild Ass Sanctuary?
- A.Ladakh
- B.Sunderbans
- C.Spiti Valley
- D.Rann of Kachchh
Show answer
Correct answer: D. Rann of Kachchh
Explanation
The correct answer is D, Rann of Kachchh. The Wild Ass Sanctuary lies in the Little Rann of Kachchh in Gujarat and is the last home of the Indian wild ass, locally called the khur, a Schedule I animal that grazes on the raised patches of grass known as bets in the salt desert. Option A is wrong because the cold desert of Ladakh holds the kiang, a different Tibetan wild ass, but the sanctuary named for the wild ass is not there. Option B is wrong because the Sundarbans of West Bengal is mangrove country and is famous for the Royal Bengal tiger and the estuarine crocodile. Option C is wrong because the Spiti valley in Himachal Pradesh is snow leopard and ibex country. Pair the khur with Gujarat and the question is settled.
In which year was the cheetah officially declared extinct in India?
- A.1947
- B.1952
- C.1972
- D.1984
Show answer
Correct answer: B. 1952
Explanation
The correct answer is B, 1952. The Asiatic cheetah once hunted across the open grassland and scrub of central and peninsular India, was trained by rulers for coursing blackbuck, and was wiped out by shooting and by the ploughing of its grassland. The government formally declared the species extinct in the country in 1952, making it the only large mammal India has lost in modern times. Option A is wrong because 1947 is the year of independence and has no link with the declaration. Option C is wrong because 1972 is the year of the Wildlife (Protection) Act, a date worth knowing but a different one. Option D is wrong because 1984 belongs to other environmental events and not to the cheetah. Examiners often place 1952 beside 1972 to see whether a candidate can keep the two apart.
Silent valley national park is located in
- A.Tamil Nadu
- B.Kerala
- C.Orissa
- D.Chhattisgarh
Show answer
Correct answer: B. Kerala
Explanation
The correct answer is B, Kerala. Silent Valley National Park lies in the Palakkad district of Kerala, in the Nilgiri hills of the Western Ghats, and protects one of the last stretches of undisturbed tropical evergreen forest in the country. It is best known as a stronghold of the lion-tailed macaque, a threatened primate found only in the Western Ghats, and it was saved from a hydroelectric project by a long public campaign before being declared a national park. Option A is wrong because Tamil Nadu, though it shares the Nilgiri landscape, holds Mudumalai and Mukurthi instead. Option C is wrong because Odisha is the state of Simlipal and the Gahirmatha turtle coast. Option D is wrong because Chhattisgarh has Indravati and Kanger Valley. Tie Silent Valley to Kerala and to the lion-tailed macaque.
The Convention on International Trade in Endangered Species of Wild Fauna and Flora, known as CITES, came into force in which year?
- A.1971
- B.1973
- C.1975
- D.1992
Show answer
Correct answer: C. 1975
Explanation
The correct answer is C, 1975. CITES was drafted and signed at Washington in 1973, but a treaty begins to bind its members only after enough countries ratify it, and that stage was reached in 1975. It controls cross border trade through three appendices, of which Appendix I forbids commercial trade in the most threatened species such as the tiger and the rhinoceros. Option A is wrong because 1971 is the year of the Ramsar Convention on wetlands, signed in Iran. Option B is wrong in this particular question because 1973 is the year of signing, not of entry into force, and the paper asks for the latter. Option D is wrong because 1992 is the year of the Rio Earth Summit and the Convention on Biological Diversity. Keep the pair 1973 signed and 1975 in force firmly in mind.
Consider the following pairs: (a) Himalayan Region and wild goat and snow leopards, (b) Andaman and Nicobar Islands and mahogany and rosewood trees, (c) Gir forest and Asiatic lions. Which of the pairs given above is or are correctly matched?
- A.(a) only
- B.(a) and (c) only
- C.(b) and (c) only
- D.(a), (b) and (c)
Show answer
Correct answer: D. (a), (b) and (c)
Explanation
The correct answer is D, all three pairs. The Himalayan region is home to wild goats such as the ibex and the tahr and to the snow leopard, which hunts them above the tree line, so pair (a) is right. The tropical evergreen forests of the Andaman and Nicobar Islands yield hardwood timber including mahogany and rosewood, so pair (b) is right. The Gir forest of Gujarat is the only wild home of the Asiatic lion, so pair (c) is right as well. Options A, B and C are therefore wrong because each leaves out a pair that is correctly matched. Matching questions of this kind reward a candidate who has learnt the species with its landscape rather than the species alone, and the safest habit is to check every pair before choosing an option that excludes one.
The hangul or Kashmir stag is protected mainly in which national park?
- A.Dachigam National Park
- B.Hemis National Park
- C.Kanha National Park
- D.Manas National Park
Show answer
Correct answer: A. Dachigam National Park
Explanation
The correct answer is A, Dachigam National Park. The hangul, also called the Kashmir stag, is the only surviving Asiatic subspecies of the red deer in India and its last viable population lives in Dachigam, a park in the hills above Srinagar whose name means ten villages. It is a Schedule I animal and the state animal of Jammu and Kashmir. Option B is wrong because Hemis in Ladakh is the high altitude park associated with the snow leopard and the bharal. Option C is wrong because Kanha in Madhya Pradesh is tiger country and the home of the hard ground barasingha, a swamp deer that candidates often mix up with the hangul. Option D is wrong because Manas in Assam protects the pygmy hog, the rhinoceros and the tiger. Deer questions turn on this one distinction.
Which of the following has been declared the National Aquatic Animal of India?
- A.Olive ridley turtle
- B.Gangetic river dolphin
- C.Dugong
- D.Ganges shark
Show answer
Correct answer: B. Gangetic river dolphin
Explanation
The correct answer is B, the Gangetic river dolphin. This nearly blind freshwater dolphin of the Ganga, Brahmaputra and Meghna systems finds its prey by echolocation and was declared the National Aquatic Animal of India in 2009, a step meant to draw attention to the pollution and damming of its rivers. It is a Schedule I species. Option A is wrong because the olive ridley turtle, famous for its mass nesting at Gahirmatha in Odisha, is protected but carries no national title. Option C is wrong because the dugong or sea cow is a threatened marine mammal of the Gulf of Mannar and the Andaman waters, and is not the national aquatic animal. Option D is wrong because the Ganges shark is a rare river shark with no such status. Remember the trio of tiger, elephant and dolphin for national titles.
Project Elephant, launched by the Government of India for the protection of elephants and their corridors, was started in which year?
- A.1972
- B.1973
- C.1986
- D.1992
Show answer
Correct answer: D. 1992
Explanation
The correct answer is D, 1992. Project Elephant was launched in 1992 to protect elephants, their habitat and the corridors along which herds move between forests, and it also deals with human elephant conflict and the welfare of captive elephants. Option A is wrong because 1972 is the year of the Wildlife (Protection) Act, the law under which such projects operate. Option B is wrong because 1973 belongs to Project Tiger, which came first and became the model for later species programmes. Option C is wrong because 1986 is the year of the Environment (Protection) Act, passed after the Bhopal gas tragedy, and has nothing to do with elephants. The elephant was later declared the National Heritage Animal in 2010, a fact often asked together with the year of the project.
Frequently Asked Questions
What is the difference between endangered and critically endangered?
Both are threatened grades of the IUCN Red List, but Critically Endangered is the more severe one: the species faces an extremely high risk of extinction in the wild, while an Endangered species faces a very high risk. Critically Endangered is the last grade before Extinct in the Wild.
Which categories of the Red List are called threatened species?
Only three: Critically Endangered, Endangered and Vulnerable. Near Threatened sounds similar but is not counted among the threatened categories, and this is a favourite trap in objective papers.
Which Act gives the highest protection to wild animals in India?
The Wildlife (Protection) Act, 1972. Animals placed in its Schedule I get the highest protection and offences against them carry the strictest punishment. The Act also provides for national parks, sanctuaries and the Central Zoo Authority.
When was Project Tiger launched and why?
Project Tiger was launched in 1973, after tiger numbers fell sharply from hunting and habitat loss. It works by setting aside tiger reserves with a strictly protected core and a buffer around it, and is supervised by the National Tiger Conservation Authority.
What is the Red Data Book?
It is the popular name for the volumes in which the IUCN publishes the conservation status of species. A country may also keep its own red data book for the plants and animals found within its borders.
Which animal is listed as extinct in India in 1952?
The Asiatic cheetah, which once ranged across the grasslands of central and peninsular India, was officially declared extinct in the country in 1952 after hunting and the loss of grassland wiped it out.
Sources
- The Wildlife (Protection) Act, 1972 — India Code, Government of India
- Biology Class XII, Chapter on Biodiversity and Conservation — NCERT
- National Tiger Conservation Authority, About Project Tiger — Ministry of Environment, Forest and Climate Change





