Environment & Biodiversity Current Affairs MCQs

Notes:
Two pairs of red-breasted parakeets were spotted on the National Institute of Technology (NIT) Patna campus, exciting birdwatchers and highlighting local biodiversity. These birds are listed as Near Threatened on the International Union for Conservation of Nature (IUCN) Red List. This is the first confirmed sighting of red-breasted parakeets in Bihar. Scientific name of the species is Psittacula alexandri, also called the moustached parakeet. They are native to Southeast Asian countries and easily identified by the large red patch on their breast.

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Scientists discovered a new species of reed snake in Mizoram and named it Calamaria mizoramensis after the state. It is a non-venomous snake, meaning it does not produce poison harmful to humans. The species is nocturnal, active mainly at night, and semi-fossorial, meaning it partly lives underground. It inhabits humid, forested hill regions at elevations of 670 to 1,295 metres above sea level, even near human settlements. The snake is small, with a dark brown to blackish body, faint stripes, and a yellow underside.

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Bombay Natural History Society (BNHS) recently released 15 critically endangered Indian vultures in Melghat Tiger Reserve, Maharashtra. Melghat Tiger Reserve is located in Maharashtra on the southern offshoot of the Satpura Range called Gavilgarh Hill. It was the first tiger reserve established in Maharashtra. The name Melghat means the confluence of several valleys reflecting its landscape. It is the catchment area of five Tapti River tributaries: Khandu, Khapra, Sipna, Gadga, and Dolar.

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Kerala and Tamil Nadu have started restoring habitats and strengthening monitoring of the grey slender loris. The grey slender loris, scientifically called Loris lydekkerianus, is a primate belonging to the family Loridae and is a prosimian, an ancient group of primates. It is found in southern India, mainly Karnataka, Kerala, and Tamil Nadu, and also in Sri Lanka. It lives in rainforests, dry forests, scrublands, bamboo areas, swamps, and montane cloud forests. It is listed as Near Threatened by the International Union for Conservation of Nature.

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The Kerala government has renamed Aralam Wildlife Sanctuary as Aralam Butterfly Sanctuary, making it the first butterfly sanctuary in the state. The sanctuary is located in Kerala and shares boundaries with Brahmagiri Wildlife Sanctuary in Karnataka, Kottiyoor Wildlife Sanctuary, and the North Wayanad forest division. It consists mainly of evergreen and semi-evergreen forest vegetation. The Cheenkanni River, originating from the Brahmagiri ranges, flows through the dense forests of the sanctuary.

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The Chadar trek on the frozen Zanskar River in Ladakh was postponed due to weak ice formation, disappointing adventure tourists. The Zanskar River is a major left-bank tributary of the Indus River and flows entirely within the Union Territory of Ladakh. It drains the remote and cold Zanskar Valley in the north-western Himalayas. The river originates at high Himalayan ranges from two main branches. One branch is the Doda River, rising near Pansi La Pass. The other branch forms from the Kargyag River near Shingo La and the Tsarap River near Baralacha La. It flows north-west and joins the Indus River near Nimmu at about 3,100 metres elevation.

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A forest fire has been raging for five days in the Valley of Flowers, a United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage Site, prompting Uttarakhand authorities to seek Indian Air Force (IAF) assistance. The Valley of Flowers National Park is located in Chamoli district of Uttarakhand and covers about 87 square kilometres. It was discovered in 1931 by British mountaineers led by Frank S. Smythe. The park is a core zone of the Nanda Devi Biosphere Reserve along with Nanda Devi National Park. It forms a transition zone between the Zanskar and Great Himalayan ranges. The area is famous for alpine meadows, rich biodiversity, scenic beauty, and snow-covered Himalayan peaks.

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A recent survey across the Ganga River basin recorded 3,037 gharials in 13 rivers despite serious survival threats. Gharial is a freshwater crocodile belonging to the Crocodylia order and Crocodylidae family. Its scientific name is Gavialis gangeticus and it mainly feeds on fish. Earlier, its range extended across Bangladesh, Bhutan, India, Myanmar, Nepal, and Pakistan. Today, major populations survive in the Chambal, Girwa, and Rapti–Naryani rivers. In India, gharial reserves are located in Uttar Pradesh, Madhya Pradesh, and Rajasthan. As per the International Union for Conservation of Nature (IUCN) Red List, it is critically endangered.

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Scientists have confirmed India’s first case of freshwater pufferfish poisoning, highlighting a new public health concern. Pufferfish belong to the order Tetraodontiformes and are also called toadfish, patkafish, balloonfish, and fugu. They are omnivorous and benthic, meaning they live and feed near the river bottom. In India, they are mainly found in the Western Ghats and river basins like Ganga, Brahmaputra, and Mahanadi. Freshwater pufferfish species in India are often endemic and indicate healthy river ecosystems. According to International Union for Conservation of Nature (IUCN), pufferfish are listed as Vulnerable.

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The Gandak River, flowing along the India–Nepal border through West Champaran in Bihar, has become the second-largest habitat of gharials after the Chambal River. Sustained conservation efforts by the Wildlife Trust of India (WTI) and the Department of Environment, Forest and Climate Change have driven this recovery. Adult gharial numbers in the Gandak increased from 54 in 2015 to over 400 in 2025, while the total population including juveniles crossed 1,000. The Chambal River remains the largest habitat with over 2,400 gharials.