Fauna of South Asia

Fauna of South Asia
Name	South Asia
Countries	India, Pakistan, Bangladesh, Nepal, Sri Lanka, Bhutan, Maldives, Afghanistan

Contents

Fauna of South Asia The fauna of South Asia encompasses the animal life across the South Asian subcontinent, spanning the Indus River, Ganges, Brahmaputra, Deccan Plateau, Western Ghats, Himalayas, and Sri Lanka; it reflects biogeographic links to the Indomalayan realm, Palearctic realm, and the Sunda Shelf. Major historical expeditions and surveys by figures associated with the British Raj, Charles Darwin, and institutions such as the Zoological Survey of India, Smithsonian Institution, and Royal Society shaped early knowledge, while modern research from universities like University of Oxford, Harvard University, Jawaharlal Nehru University, University of Cambridge, and organizations including World Wildlife Fund and International Union for Conservation of Nature drive contemporary conservation.

Overview and Biogeography

South Asia's biogeography is structured by orogeny of the Himalayas, monsoon regimes influenced by the Indian Ocean Dipole and Monsoon (South Asian), and Pleistocene refugia tied to glacial cycles studied by teams from the Natural History Museum, London and Max Planck Society. Faunal assemblages show affinities with the Sundaland, Indochina, and the Irano‑Turanian region, producing mosaics of taxa recorded in collections at the British Museum, American Museum of Natural History, and Zoological Survey of India. Paleontological finds from sites like the Siwalik Hills, Chotanagpur Plateau, and Mehrgarh illuminate vertebrate turnover documented alongside colonial-era surveys by the Asiatic Society of Bengal. Regional biogeographic analyses are framed within concepts developed by Alfred Russel Wallace, Philip Sclater, and modern syntheses from the International Biogeography Society.

The region contains a diversity of ecosystems: tropical moist evergreen forests of the Western Ghats and Nilgiri Hills, dry deciduous forests of the Deccan Plateau and Chota Nagpur, montane coniferous and alpine zones of the Himalayas and Karakoram, mangrove swamps of the Sundarbans, freshwater wetlands of the Bengal Delta and Indus Delta, coastal coral reefs of the Lakshadweep and Maldives, and arid systems of the Thar Desert and Rann of Kachchh. These habitats host assemblages comparable across conservation ecoregions defined by the World Wide Fund for Nature and mapped with contributions from the United Nations Environment Programme and Convention on Biological Diversity.

Mammals: South Asian mammal fauna includes iconic species such as the Bengal tiger, Indian elephant, Asiatic lion, snow leopard, Indian rhinoceros, sloth bear, and diverse primates like the Hanuman langur and Rhesus macaque, with specimen histories in the British Museum of Natural History and studies by researchers at Wildlife Institute of India and WWF India.

Birds: Avifauna ranges from Indian peafowl and Great Indian bustard to migratory species using the Central Asian Flyway and sites listed under the Ramsar Convention on Wetlands such as Keoladeo National Park and Chilika Lake; ornithological surveys have been published by the British Ornithologists' Union and Cornell Lab of Ornithology.

Reptiles and Amphibians: Reptilian diversity includes crocodilians like the Gharial and snakes such as the King cobra, while amphibian endemism is high in the Western Ghats and Sri Lankan rainforests with taxonomic revisions from the Natural History Museum, London and the American Museum of Natural History.

Fish: Freshwater and marine ichthyofauna include endemic cyprinids in the Ganges and Indus, commercially important stocks in the Bay of Bengal and Arabian Sea, and coral‑reef associated assemblages around the Lakshadweep and Andaman Islands, with fisheries research by the Food and Agriculture Organization.

Invertebrates: Invertebrate diversity spans Lepidoptera, Odonata, Coleoptera, and marine taxa; notable work on pollinators, soil fauna, and entomological inventories has been conducted by institutions like the Indian Council of Agricultural Research, Zoological Survey of India, and the Natural History Museum, London.

Endemism is concentrated in biodiversity hotspots such as the Western Ghats, Sri Lanka, and Eastern Himalaya, featuring endemics like the Nilgiri tahr, Purple frog, Sri Lankan leopard, and numerous amphibian and plant taxa cataloged in assessments by the IUCN Red List. Threatened taxa include the Bengal tiger (covered by Project Tiger), Asiatic cheetah (historically extirpated in the region), and the Gharial, with recovery efforts tied to national policies of India, Nepal, Bangladesh, and international agreements including the Convention on International Trade in Endangered Species of Wild Fauna and Flora.

Conservation frameworks combine national protected area systems such as India's National Parks of India and Tiger Reserves of India, Nepal's Chitwan National Park, Sri Lanka's Yala National Park, and transboundary initiatives across the Himalayan region supported by entities like the World Bank, United Nations Development Programme, and Convention on Biological Diversity. Major threats are habitat loss from agriculture linked to policies in Green Revolution in India, urbanization around cities like Mumbai, Karachi, Dhaka, and Kathmandu, infrastructure projects including dams on the Teesta River and Indus River, poaching networks exposed in investigations by Interpol and NGOs such as TRAFFIC. Conservation science is advanced via collaborations with universities including University of Cambridge, University of Oxford, Stanford University, and regional research centers such as the Wildlife Institute of India and Bangladesh Forest Research Institute implementing community-based models inspired by examples like Chipko movement heritage and payment for ecosystem services piloted with support from the World Bank.