Rajasthan Flora and Fauna: Biodiversity Hotspots and Protected Species for RAS

Rajasthan flora and fauna represent one of India's most ecologically significant yet challenging ecosystems. For RAS (Rajasthan Administrative Service) Prelims aspirants, understanding the biodiversity hotspots, protected species, and conservation status of Rajasthan is non-negotiable. The state covers 10.4% of India's land area but harbors remarkable ecological diversity—from the arid Thar Desert to riparian zones and wildlife sanctuaries. This comprehensive guide decodes Rajasthan's biodiversity with exam-relevant precision, featuring official data, species profiles, and practice questions aligned with the 2025-26 RPSC syllabus.

Rajasthan Biodiversity: An Overview

Rajasthan's biodiversity is paradoxical. While 60% of the state is covered by arid and semi-arid zones, it remains a critical habitat for endemic and vulnerable species. The state's flora and fauna are shaped by three dominant ecosystems: the Thar Desert, deciduous forests, and wetlands [SOURCE: Rajasthan State Biodiversity Board].

According to the Rajasthan Biodiversity Strategy and Action Plan (RBSAP) 2016-2025, the state hosts:

2,500+ plant species (including 500+ endemic species)
680+ vertebrate fauna species
150+ mammal species
500+ bird species
4,400+ insect species

This biodiversity spans across 10 biogeographic zones as per the Wildlife Institute of India (WII) classification, making Rajasthan flora and fauna study essential for RAS General Studies Paper-I (GS-I) ecology questions.

Major Ecosystems and Flora of Rajasthan

Thar Desert Flora

The Thar Desert dominates western Rajasthan, covering approximately 60% of the state's area. Rajasthan flora adapted to arid conditions includes:

Khejri (Prosopis cineraria): State tree of Rajasthan; nitrogen-fixing drought-resistant species
Neem (Azadirachta indica): Multi-purpose tree with medicinal properties
Acacia species: Acacia senegal, A. nilotica (babul) are critical for fuel and fodder
Euphorbia and Suaeda species: Succulent halophytes tolerating saline soils
Ghaf (Neem-like legume): Found in southwest Rajasthan near Gujarat border

Key adaptation features: Xerophytic characteristics, deep root systems, reduced leaf surface, and seasonal dormancy during droughts.

Dry Deciduous Forest Flora

Eastern and southeastern Rajasthan (Kota, Bundi, Chittorgarh districts) harbor dry deciduous forests classified as Type 5C (Dry Deciduous Forest) under Champion & Seth classification.

Major species:

Teak (Tectona grandis): Premium timber species; restricted to southern districts
Dhok/Phalai (Anogeissus pendula): Dominant canopy species; erosion control
Sal (Shorea robusta): Limited presence; requires higher rainfall
Mahua (Madhuca longifolia): Oil-yielding tree; tribal subsistence importance
Tendu (Diospyros melanoxylon): Leaves used for bidi production

Grassland and Wetland Flora

Rajasthan's riparian zones and wetlands support distinct flora:

Sagwan forests (Tectona grandis plantations): Productivity 1.5-2 tonnes/hectare
Dhok forests: Supporting grass communities for pastoral systems
Wetland vegetation: Water-hyacinth, reeds, sedges in Lake Sambhar, Anasagar, Pichola

Rajasthan Fauna: Iconic and Endangered Species

Mammals of Conservation Significance

Rajasthan fauna includes several globally significant mammalian species:

Indian Wild Ass (Equus hemionus khur)

Status: Endangered; endemic to Little Rann of Kutch (partially in Rajasthan)
Population: ~2,500 individuals (as of 2023)
Habitat: Semi-arid grasslands and scrub
Protection: Listed under Schedule-I, Wildlife Protection Act, 1972
Conservation note: Successful reintroduction efforts in Nanda Devi Biosphere Reserve

Indian Gazelle / Chinkara (Gazella bennettii)

Distribution: Throughout arid Rajasthan (endemic to Indian subcontinent)
Population: Estimated 6,000-8,000 in Rajasthan
Threats: Habitat loss, poaching
Found in: Desert National Park, Tal Chhapar Sanctuary

Blackbuck (Antilope cervicapra)

Stronghold: Tal Chhapar Wildlife Sanctuary (2,000+ individuals)
Status: Vulnerable; recovered from <1,500 in 1990s
Unique feature: Males exhibit twisted horns; sexual dimorphism
Breeding season: July-October

Sloth Bear (Melursus ursinus)

Habitat: Dry forests of south-central Rajasthan (Ranthambhore, Mukundra Hills)
Status: Vulnerable; Schedule-I protection
Population: 150-200 individuals
Threats: Habitat fragmentation, human-wildlife conflict

Bengal Tiger (Panthera tigris tigris)

Reserve populations: Ranthambhore (50-60 tigers), Mukundra Hills Tiger Reserve (15-20)
Corridor: Ranthambhore-Kuno corridor (cross-state movement)
Census: All-India Tiger Estimation 2022 reported declining trends
Status: IUCN-Vulnerable; Schedule-I

Avifauna Hotspots

Rajasthan ranks among India's top birding destinations with 500+ recorded species [SOURCE: Bombay Natural History Society].

Migratory Hotspots

Lake Sambhar: 175 bird species; designated Ramsar site (1990)
Tal Chhapar Sanctuary: Demoiselle cranes (Anthropoides virgo); 10,000-15,000 individuals migrate September-March
Nakki Lake, Mount Abu: 200+ species; Nilgai, sambar deer coexist

Endemic and Threatened Birds

Bengal Florican (Houbaropsis bengalensis): Critically endangered; Tal Chhapar only breeding site in India
Great Indian Bustard (Ardeotis nigriceps): Critically endangered; population <200 globally; Desert National Park is stronghold
Pallid Harrier (Circus macrourus): Winter migrant; Rajasthan is key wintering ground
Spotted Eagle-Owl (Buffy Fish Owl): Listed threatened; riparian habitat dependence

Reptiles and Herpetofauna

Indian Cobra (Naja naja): Highly venomous; cultural significance in Rajasthan
Russell's Viper (Daboia russelii): Responsible for highest human mortality among snake bites
Mugger Crocodile (Crocodylus palustris): Freshwater ecosystems; reintroduced in Lake Pichola
Monitor Lizards: Varanus bengalensis (common); V. salvator (rare)
Gharial (Gavialis gangeticus): Critically endangered; status unknown in Rajasthan

Protected Areas and Biodiversity Hotspots

Tiger Reserves (Project Tiger)

Tiger Reserve	Year Established	Area (sq km)	Tiger Population (2022)	Notable Features
Ranthambhore	1973	1,334	50-60	Iconic forts; human-wildlife interface
Mukundra Hills	2010	1,218	15-20	Dry deciduous; buffer for Ranthambhore

Data source: Project Tiger, Ministry of Environment, Forest and Climate Change (MoEFCC)

National Parks

Desert National Park (Jaisalmer)

Area: 3,162 sq km
Flora: Khejri, acacia, halophytes
Fauna: Chinkara, nilgai, golden jackal, great Indian bustard
Established: 1980
Significance: Largest cold desert ecosystem hotspot

Ranthambhore National Park (Sawai Madhopur)

Area: 392 sq km core zone
Flora: Dry deciduous, dhok forests
Fauna: Tigers, leopards, sloth bears, sambar, chital
Established: 1980 (formerly hunting ground of Jaipur rulers)

Wildlife Sanctuaries (Key Exam-Relevant)

Tal Chhapar Wildlife Sanctuary (Churu)

Area: 7.19 sq km (smallest in Rajasthan)
Specialty: Demoiselle cranes, blackbuck, Bengal florican
Designation: Ramsar Site (Wetland of International Importance), 1989
Habitat: Grassland-wetland mosaic

Mount Abu Wildlife Sanctuary

Area: 288 sq km
Flora: Subtropical forests; transition zone between Deccan and Aravalli
Fauna: Sambar, muntjac, leopard, paradise flycatcher
Significance: Highest point in Rajasthan (1,722 m); endemic species concentration

Kumbhalgarh Wildlife Sanctuary (Rajsamand)

Area: 610 sq km
Flora: Dry deciduous, mixed forests
Fauna: Panther, sambar, chital, sloth bear
Features: Fort walls within sanctuary; grazing restrictions

Mukundra Hills Tiger Reserve (Kota)

Area: 1,218 sq km
Flora: Sal, teak, khair, bamboo
Fauna: Tigers, leopards, wild boar, nilgai
Reintroduction: Cheetahs introduced June 2023 as part of Project Cheetah Phase-II

Tal Chhapar and Sambhar Lake Comparison [INTERNAL: wetland-conservation-rajasthan]

Parameter	Tal Chhapar	Lake Sambhar
Area	7.19 sq km	240 sq km (seasonal variation)
Ramsar Status	Yes (1989)	Yes (1990)
Primary habitat	Grassland-wetland	Salt lake
Key species	Demoiselle cranes, Bengal florican	Migratory waterfowl, flamingos
Salinity level	Freshwater	Hypersaline (23-50 ppt)

Endemic and Endangered Species of Rajasthan

Flora—Critically Endangered

Salvadora persica (Peelu): Arid zone endemic; medicinal value; habitat loss in western Rajasthan
Euphorbia caducifolia: Succulent endemic; pharmaceutical use driving poaching
Calaotropis procera: Used in traditional medicine; overexploitation

Fauna—Critically Endangered

Species	English Name	IUCN Status	Population in Rajasthan
Ardeotis nigriceps	Great Indian Bustard	CR (Critically Endangered)	<50
Houbaropsis bengalensis	Bengal Florican	CR	<200 globally; ~50 in Tal Chhapar
Panthera pardus	Leopard	VU (Vulnerable)	600-800 (estimate)
Panthera leo leo	Asiatic Lion	VU	0 (local extinction ~1880s)
Equus hemionus khur	Indian Wild Ass	EN (Endangered)	2,500 (mainly Gujarat)

IUCN Red List 2024; Rajasthan Forest Department records

Human-Wildlife Conflict and Conservation Challenges

Conflict Hotspots

Tiger-Human Interface (Ranthambhore periphery): 5-8 human deaths annually; livestock predation
Leopard Incursions (Urban Jaipur/Udaipur): 10-12 incidents yearly; increasing urban encroachment
Nilgai Crop Raiding: Feral populations damaging agriculture; no legal hunting allowed
Sloth Bear Attacks: 15-20 incidents annually in south-central Rajasthan

State-Level Initiatives [SOURCE: Rajasthan Forest Department]

Rajasthan Habitat Restoration Scheme (2015): ₹50 crore investment; 50,000 hectares target
Community Conserved Area Network: 100+ village-level conservation groups
Project Cheetah Phase-II (2023): 5 cheetahs introduced at Mukundra Hills; largest reintroduction post-extinction
Human-Wildlife Conflict Mitigation Fund: ₹5 crore annually for compensation and insurance

Rajasthan Flora and Fauna: RAS Syllabus Alignment

The study of Rajasthan flora and fauna aligns with RPSC RAS Prelims Syllabus 2025-26 under:

General Studies-I (GS-I): Ecology, environment, and biodiversity (25-30 questions out of 150)
General Studies-II (GS-II): Environmental policy, conservation acts (5-10 questions)

Key topics frequently asked (2020-2024 exam analysis):

State wildlife sanctuaries and their biodiversity (3-5 MCQs annually)
Endangered species and IUCN status (2-3 MCQs)
Endemic flora/fauna of Rajasthan (2-4 MCQs)
Ramsar Sites and wetland conservation (1-2 MCQs)
Tiger reserves and Project Tiger objectives (2-3 MCQs)

Key Takeaways

Rajasthan flora and fauna span 10 biogeographic zones with 2,500+ plant species and 680+ vertebrate species adapted to arid, deciduous, and wetland ecosystems—critical exam focus for GS-I ecology questions.
Tiger Reserves (Ranthambhore, Mukundra Hills) and National Parks (Desert, Ranthambhore) protect flagship species like Bengal tigers, sloth bears, and great Indian bustards; Project Cheetah Phase-II reintroduced 5 cheetahs at Mukundra Hills in 2023.
Tal Chhapar (7.19 sq km grassland) and Lake Sambhar (240 sq km salt lake) are Ramsar Sites hosting demoiselle cranes, Bengal floricans, and migratory waterfowl—both highly testable for RAS Prelims.
Critically endangered species (Great Indian Bustard <50, Bengal Florican <200 globally) and vulnerable taxa (leopards 600-800, blackbucks 6,000-8,000) demonstrate Rajasthan's conservation priority but fragile status.
Human-wildlife conflict (5-8 tiger deaths, 10-12 leopard incidents annually) and state initiatives (₹50 crore Habitat Restoration Scheme, ₹5 crore conflict mitigation fund) reflect conservation-development tension—policy-relevant for GS-II analysis.

Frequently Asked Questions

Q: What is the most endangered species in Rajasthan and why is it critically threatened?

A: The Great Indian Bustard (Ardeotis nigriceps) is the most critically endangered species in Rajasthan with a global population of <200 individuals. In Rajasthan, <50 are estimated to survive, primarily in Desert National Park. Threats include: (1) habitat loss due to desert afforestation and agricultural expansion, (2) collision with power transmission lines, (3) grazing pressure reducing grassland quality, and (4) poaching. The species is listed as Critically Endangered (CR) by IUCN and Schedule-I under the Wildlife Protection Act, 1972.

Q: How many tiger reserves does Rajasthan have and what is their significance for the RAS exam?

A: Rajasthan has 2 tiger reserves: (1) Ranthambhore Tiger Reserve (established 1973; 1,334 sq km; 50-60 tigers), and (2) Mukundra Hills Tiger Reserve (established 2010; 1,218 sq km; 15-20 tigers). For RAS Prelims, this is important because: Tiger reserves represent Project Tiger implementation, candidates must distinguish between reserve areas and national park zones, species composition differences reflect ecosystem variation (dry deciduous vs. mixed forests), and conservation success/conflict statistics are frequently tested. Ranthambhore's human-wildlife interface near settlements is a policy question focus.

Q: What distinguishes Tal Chhapar from Lake Sambhar as biodiversity hotspots?

A: Tal Chhapar is a small (7.19 sq km) grassland-wetland sanctuary in Churu district, designated Ramsar Site in 1989, specializing in migratory demoiselle cranes (10,000-15,000 September-March) and the critically endangered Bengal Florican. Lake Sambhar is a large (240 sq km, seasonal) hypersaline salt lake in Jaipur district, designated Ramsar Site in 1990, hosting 175 bird species including flamingos and diverse migratory waterfowl. Exam distinction: Tal Chhapar tests grassland ecology and endemic avifauna knowledge; Lake Sambhar tests wetland salinity adaptation and migratory patterns. Both are testable for habitat-species matching MCQs.

Practice Questions

1. The Great Indian Bustard, critically endangered in Rajasthan, faces maximum threat from:

a) Overgrazing and habitat fragmentation
b) Collision with power transmission lines and habitat loss
c) Poaching for feathers only
d) Competition from feral horses

Answer: b) Collision with power transmission lines and habitat loss

Explanation: While all factors contribute, collision with high-voltage power lines (particularly in Desert National Park region) and habitat loss due to agricultural expansion and afforestation of natural grasslands are the primary drivers of GIB population decline. Poaching is secondary; competition with horses is minimal.

2. Which of the following pairs correctly matches a Rajasthan wildlife sanctuary with its primary conservation focus species?

a) Mukundra Hills Tiger Reserve – Asiatic Lion
b) Mount Abu Wildlife Sanctuary – Demoiselle Cranes
c) Tal Chhapar Wildlife Sanctuary – Bengal Florican and Blackbuck
d) Desert National Park – Mugger Crocodile

Answer: c) Tal Chhapar Wildlife Sanctuary – Bengal Florican and Blackbuck

Explanation: Tal Chhapar (7.19 sq km) is the stronghold for Bengal Floricans in India (critically endangered) and supports 2,000+ blackbucks. Mukundra Hills focuses on tigers/cheetahs (not lions—Asiatic lions are extinct in Rajasthan). Mount Abu hosts sambar/muntjac, not cranes. Desert National Park protects bustards and chinkara, not crocodiles. This sanctuary pairing is a favorite RAS question type.

3. Lake Sambhar differs from Tal Chhapar in being:

a) Larger in area with higher salinity levels and different avifaunal composition
b) Smaller in area with freshwater and endemic flora dominance
c) Similar in area but with higher predator populations
d) Designated as a Biosphere Reserve rather than a Ramsar Site

Answer: a) Larger in area with higher salinity levels and different avifaunal composition

Explanation: Lake Sambhar (240 sq km) is significantly larger than Tal Chhapar (7.19 sq km) and is a hypersaline salt lake (23-50 ppt salinity) vs. Tal Chhapar's freshwater. Sambhar hosts 175 species including salt-tolerant flamingos and diverse waterfowl, while Tal Chhapar specializes in grassland species. Both are Ramsar Sites (not biosphere reserves), designated 1989 and 1990 respectively.

Last Updated

May 2024 | Verified for RPSC RAS 2025-26 exam cycle | Data sourced from Ministry of Environment, Forest & Climate Change; Wildlife Institute of India; Rajasthan State Biodiversity Board; Project Tiger; IUCN Red List 2024.