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Subject: Biodiversity

1. Ecology & Ecosystems
2. Indian Biodiversity

  • Barbary Macaque

    Why in the News

    Scientists studying the Barbary Macaque population in Gibraltar have observed geophagy (soil eating) behavior. This is believed to help them counter the harmful effects of tourist provided junk food.

    About Barbary Macaque

    • One of the 25 species of macaques worldwide
    • The only macaque species found outside Asia
    • The only non human primate in Europe and North Africa

    Distribution

    • Native range:
      • Atlas Mountains in Algeria and Morocco
    • Introduced population: Gibraltar
    • IUCN Red List: Endangered
    [2013] In which of the following states is lion-tailed macaque found in its natural habitat? 
    1 Tamil Nadu
    2 Kerala 
    3 Karnataka 
    4 Andhra Pradesh 
    Select the correct answer using the codes given below: 
    (a) 1, 2 and 3 only (b) 2 only (c) 1, 3 and 4 only (d) 1, 2, 3 and 4

  • State of India’s Bats Report  

    Why in the News?

    • First-ever national assessment “State of India’s Bats (2024–25)” highlights threats, neglect, and data gaps in bat conservation in India.

    Key Findings

    • Total bat species in India: ~135
    • 16 species endemic (found only in India)
    • 7 species threatened (IUCN Red List)
    • 35 species:
      • Not assessed / data deficient
    • Indicates serious knowledge gap

    About the Report

    • Title: State of India’s Bats (2024–25)
    • Led by:
      • Nature Conservation Foundation
      • Bat Conservation International
    • Contributors: 36 experts and 27 institutions
    [2024] Consider the following statements : 
    Statement-I : The Indian Flying Fox is placed under the “vermin” category in the Wild Life (Protection) Act, 1972. 
    Statement-II : The Indian Flying Fox feeds on the blood of other animals. 
    Which one of the following is correct in respect of the above statements? 
    a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I 
    b) Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I 
    c) Statement-I is correct, but Statement-II is incorrect 
    d) Statement-I is incorrect, but Statement-II is correct

  • Indus River Dolphin  

    Why in the News?

    • Conservation reserves, citizen science, and habitat protection efforts are helping the Indus River Dolphin population recover in India, particularly in the Beas River.

    About the Indus River Dolphin

    • Scientific Name: Platanista minor
    • Common Name: Indus River Dolphin
    • Type: Freshwater river dolphin
    • One of the rarest mammals in the world
    • IUCN Status is Endangered

    Distribution

    • Primary Habitat: Indus River system (Pakistan)
    • India:
      • Beas River (Punjab) — small remnant population
    • Earlier found across:
      • Indus tributaries (Ravi, Sutlej, Chenab, Jhelum)

    Physical Appearance

    • Long, pointed snout
    • Visible teeth even when mouth is closed
    • Flexible neck (rare among dolphins)
    • Small dorsal fin
    [2019] Consider the following pairs: Wildlife Naturally found in 
    1. Blue-finned Mahseer: Cauvery River 
    2. Irrawaddy Dolphin: Chambal River 
    3. Rusty-spotted Cat: Eastern Ghats 
    Which of the pairs given above are correctly matched? 
    [A] 1 and 2 only [B] 2 and 3 only [C] 1 and 3 only [D] 1, 2 and 3

  • IUCN Uplists Emperor Penguin and Antarctic Fur Seal to Endangered

    Why in the News?

    The International Union for Conservation of Nature (IUCN) has uplisted the Emperor Penguin and Antarctic Fur Seal to the Endangered category, citing severe impacts of climate change and habitat loss.

    About Emperor Penguin

    • Largest penguin species in the world
    • Found only in Antarctica
    • Considered sentinel species of Antarctic ecosystem
    • IUCN Status: Endangered

    Antarctic Fur Seal

    About

    • Marine mammal
    • Member of eared seal family
    • IUCN Status: Endangered

    Habitat

    • Antarctic and Sub Antarctic waters
    • Major breeding ground:
      • South Georgia Island

    Key Threats

    • Climate change reducing krill population
    • Ocean warming pushing krill deeper
    • Food shortage for seals
    [2011] The ‘Red Data Books’ published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of:
    (a) Endemic plant and animal species present in the biodiversity hotspots.
    (b) Threatened plant and animal species.
    (c) Protected sites for conservation of nature and natural resources in various countries.
    (d) None of the above

  • Indian Softshell Turtle Rescued in Greater Noida

    Why in the News?

    Police in Greater Noida rescued 16 Indian Softshell Turtles from smugglers. The species is protected under Schedule I of Wildlife Protection Act.

    About Indian Softshell Turtle

    • Scientific Name: Nilssonia gangetica
    • Also called: Gangetic Softshell Turtle
    • Type: Freshwater turtle
    • Family: Trionychidae (soft shelled turtles)

    Conservation Status

    • IUCN Status: Endangered
    • Wildlife Protection Act 1972: Schedule I
    • CITES: Appendix I

    Habitat & Distribution

    • Found in river systems: Ganga, Indus, and Mahanadi
    • Countries: India, Pakistan, Nepal, and Bangladesh
    • Habitat: Deep rivers, Lakes, Canals, and Muddy riverbeds

    Key Features

    • Leathery soft shell
    • Olive green colour
    • Long snorkel like nose
    • Size up to 94 cm
    • Omnivorous scavenger

    Why Smuggled

    • Myth of 20 claws brings good luck
    • Used in illegal wildlife trade
    • False medicinal beliefs
    [2017] In India, if a species of tortoise is declared protected under Schedule I of the Wildlife (Protection) Act, 1972, what does it imply? 
    (a) It enjoys the same level of protection as the tiger. 
    (b) It no longer exists in the wild, a few individuals are under captive protection; and now it is impossible to prevent its extinction. 
    (c) It is endemic to a particular region of India. 
    (d) Both (b) and (c) stated above are correct in this context.

  • Why Was a Sloth Bear Captured Near Shivamogga Airport in Karnataka?

    Why in News?

    The Karnataka Forest Department captured a female sloth bear near Shivamogga airport after it entered nearby villages and airport premises, raising concerns about human wildlife conflict.

    What Is Sloth Bear?

    • Scientific Name Melursus ursinus
    • Found in Indian Subcontinent
     • Habitat: Dry forests, Grasslands, Scrub forests
    • Known for Insect feeding, Strong claws, and Human conflict incidents

    Conservation Status

    • IUCN Status Vulnerable
    • Wildlife Protection Act 1972
    • Listed under Schedule I protection

    [2022] With reference to Indian laws about wildlife protection, consider the following statements: 
    1 Wild animals are the sole property of the government. 
    2 When a wild animal is declared protected, such animal is entitled for equal protection whether it is found in protected areas or outside. 
    3 Apprehension of a protected wild animal becoming a danger to human life is sufficient ground for its capture or killing. 
    Which of the statements given above is/are correct? 
    (a) 1 and 2 (b) 2 only (c) 1 and 3 (d) 3 only

  • New Butterfly Species Named After Zubeen Garg

    Why in the news?

    A new butterfly species discovered in Arunachal Pradesh’s Leparada district has been named Euthalia zubeengargi in honour of Zubeen Garg, a cultural icon of Assam, whose death on September 19, 2025 triggered widespread public reaction.

    What Is the Newly Discovered Butterfly Species?

    • Scientific Name: Euthalia zubeengargi
    • Common Name Proposed: Basar Duke
    • Genus: Euthalia
    • Habitat: Semi evergreen forests
    • Elevation Range: 600 to 750 metres
    • Location: Leparada district, Arunachal Pradesh

    Why Is the Discovery Important?

    • Only Two Male Individuals recorded
    • One Collected Specimen
    • One Photographed in Wild
    • Indicates Rare or Highly Localised Species
    • Found in Forest Ecosystem of Eastern Himalayas

    [2016] Recently, for the first time in our country, which of the following States has declared a particular butterfly as ‘State Butterfly’? 
    (a) Arunachal Pradesh (b) Himachal Pradesh (c) Karnataka (d) Maharashtra

  • India’s Frogs: Conservation Gains through Science & Citizen Action

    Why in News

    • On World Frog Day (March 20), attention is drawn to India’s amphibians, where citizen science and conservation initiatives are helping address rising threats like climate change and habitat loss.

    Ecological Importance of Frogs

    • Act as link between aquatic and terrestrial ecosystems
    • Control insect populations (pests)
    • Serve as food for higher vertebrates
    • Help convert: → Insect biomass → Vertebrate biomass

    Global & Indian Status

    • As per International Union for Conservation of Nature:
      • Amphibians = most threatened vertebrates
      • 37 species extinct globally
    • India:
      • 450+ amphibian species
      • ~25% threatened
      • ~20% data deficient

    Major Threats to Frogs

    1. Disease (Historical Driver)

    • Chytridiomycosis caused by:
      • Batrachochytrium dendrobatidis
      • Batrachochytrium salamandrivorans
    • Affects frog skin (critical for respiration & ion balance)
    • Impact: → Affected >60% amphibians globally

    2. Climate Change (Current Major Driver)

    • Impacts 39% species
    • Causes:
      • Mismatch in monsoon timing
      • Breeding failures due to: Early rains + prolonged dry spells

    3. Habitat Loss

    • Impacts 37% species
    • Includes: Wetland loss, Deforestation, and Urbanisation. 
    [2024] Consider the following: 
    1. Butterflies 
    2. Fish 
    3. Frogs 
    How many of the above have poisonous species among them? 
    (a) Only one (b) Only two (c) All three (d) None

  • Seals Trade Safety for Food: Arctic Study 

    Why in News

    • A study published in Ecology Letters (March 2026) by University of British Columbia and collaborators shows ringed seals risk predation to access diverse food in the Arctic.

    Key Species Involved

    • Ringed seal: Primary prey species in Arctic marine ecosystems
    • Polar bear: Main predator dependent on sea ice for hunting

    Study Area & Method

    • Location: Eastern Hudson Bay (Arctic region)
    • Tracked: 26 seals and 39 polar bears
    • Tools: GPS tracking, Dive data analysis and Sea-ice mapping + fish diversity models

    Core Findings

    1. Food vs Fear Trade-off

    • Seals avoid high-risk zones (areas with many polar bears)
    • BUT:
      • Enter these zones if food diversity is high
      • Stay longer underwater (long dives) even in danger zones

    2. “Landscape of Fear” Concept

    • Animals modify behavior based on predator presence
    • Seals:
      • Move quickly through risky areas
      • Adjust diving patterns depending on threat level

    3. Portfolio Effect (Very Important)

    • Seals prefer diverse prey instead of a single food source
    • Similar to financial diversification:
      • Reduces risk of food scarcity in changing environments

    4. Behavioral Adaptations

    • Possible ability to: Detect predators (e.g., listening for polar bears on ice)
    • Limitation: Hard to scientifically capture such micro-behaviors

    5. Climate Change Impact

    • Melting sea ice leads to:
      • Altered predator-prey interactions
      • Increased bear density in smaller ice areas
      • Entry of new predators like killer whales

    Key Ecological Insight

    • Wildlife survival depends on dual factors:
      1. Food availability
      2. Predation risk
    [2015] The term ‘IndARC’, sometimes seen in the news, is the name of: (a) an indigenously developed radar system inducted into Indian Defence (b) India’s satellite to provide services to the countries of Indian Ocean Rim (c) a scientific establishment set up by India in Antartic region (d) India’s underwater observatory to scientifically study the Arctic region

  • Wild Buffalo Translocation: Kaziranga to Kanha Initiative

    Why in the News

    Authorities have planned to translocate ~50 Asiatic wild water buffaloes from Kaziranga National Park to Kanha Tiger Reserve in a phased manner, starting with a smaller group.

    About the Species

    • Asiatic Wild Water Buffalo
      • Scientific name: Bubalus arnee
      • Status: Endangered (IUCN)
      • India holds major global population

    Key Details of the Plan

    • Total planned: ~50 buffaloes
    • Initial phase: 5–15 individuals
    • Method:
      • Tranquilization and capture
      • Gradual relocation after feasibility checks

    Why Translocation is Being Done?

    • Species Conservation: Avoids over-concentration in one area
      • Reduces risk from: Disease outbreaks and Natural disasters.
    • Kanha Tiger Reserve historically had wild buffaloes
      • Aim: restore lost populations
    • Genetic Diversity: Helps maintain: Healthy breeding populations and Reduced inbreeding.

    Why Kaziranga?

    • Hosts 1000+ wild buffaloes
    • One of the strongest populations globally
    • Suitable as a source population

    Why Kanha?

    • Suitable: Habitat (grasslands + water sources)
    • Part of central Indian landscape restoration
    [2017] According to the Wildlife (Protection) Act, 1972, which of the following animals cannot be hunted by any person except under some provisions provided by law? 
    1. Gharial Indian 
    2. Wild ass 
    3. Wild buffalo 
    Select the correct answer using the code given below: 
    (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3