Wetlands are among the most crucial, yet often underestimated, ecosystems on Earth. Far from being mere swamps or unproductive marshlands, they are ecological powerhouses providing essential services that sustain both nature and human civilization. Often called the “kidneys of the landscape,” wetlands purify water by filtering pollutants and excess nutrients, playing a critical role in maintaining regional water quality and recharging groundwater reserves.
Their ecological and climate contributions are monumental. They act as natural sponges, absorbing massive amounts of rainwater and floodwaters, thereby preventing catastrophic inundation. Furthermore, wetlands are vital carbon sinks. Peatlands, a specific type of wetland, store twice as much carbon as all the world’s forests combined, making them indispensable in the global fight against climate change. Ecologically, wetlands serve as biodiversity hotspots, providing critical habitats, breeding grounds, and feeding areas for countless species of fish, invertebrates, amphibians, and migratory waterbirds. Recognizing the accelerating degradation and loss of these vital ecosystems, the international community established a foundational treaty solely dedicated to their conservation.
The Ramsar Convention: A Global Commitment to Aquatic Lands
The world’s first-ever modern multilateral environmental agreement was dedicated to the protection of these aquatic lands. After years of growing scientific alarm regarding the drastic decline in migratory waterbird populations, the effort culminated in the signing of the Convention on Wetlands of International Importance especially as Waterfowl Habitat.
The treaty was signed on February 2, 1971, in the Iranian city of Ramsar, on the shores of the Caspian Sea, giving the Convention its enduring name. Following ratification by its initial member nations, the treaty officially entered into force on December 21, 1975. This day of signing, February 2nd, is now globally observed as World Wetlands Day, a platform to raise awareness about the indispensable value of these ecosystems.
The Three Pillars of Ramsar
The Ramsar Convention operates on three central principles, referred to as its “three pillars,” guiding the conservation efforts of all member nations:
- Wise Use: This is the core philosophy. Contracting parties commit to the “wise use” of all wetlands within their territory—designated or not. Wise Use is defined as the maintenance of their ecological character, achieved through the implementation of ecosystem approaches within the context of sustainable development. This means wetlands must be conserved while simultaneously allowing for sustainable and rational use by local communities.
- Designation of Ramsar Sites: Each party must designate suitable wetlands for the List of Wetlands of International Importance (Ramsar Sites). The designation signifies that the site is of immense global value.
- International Cooperation: Parties are obligated to cooperate on managing transboundary wetlands, shared water systems, and shared species (like migratory birds), and on development projects that might impact the wetlands of other parties.
The Montreux Record
A critical component is the Montreux Record. This is a register of Ramsar Sites where changes in ecological character have occurred, are occurring, or are likely to occur due to technological developments, pollution, or human interference. Listing a site on the Montreux Record signifies an urgent need for conservation intervention and prioritizes international support for sites facing severe threats.
Global Reach and Top Site Contributors
The Ramsar Convention has established a massive global footprint, overseeing a network of over 2,500 Ramsar Sites across the world. The world’s first Ramsar Site was Cobourg Peninsula in Australia, designated in 1974. This colossal protected area is crucial for supporting global water security and acting as a collective defense against climate change impacts.
Top Global Contributors (By Site Count)
| Rank | Country | Number of Ramsar Sites |
| 1 | United Kingdom | 176 |
| 2 | Mexico | 144 |
| 3 | India | 94 |
| 4 | Spain | 77 |
| 5 | China | 64 |
Note: While these countries lead in site count, nations like Bolivia hold the largest designated area globally, largely due to vast, contiguous floodplains.
India’s Surging Commitment: The Path to 94 Sites
India, characterized by immense geographical diversity, possesses a rich tapestry of wetland ecosystems, from high-altitude glacial lakes to expansive coastal backwaters and mangrove forests. The country has dramatically stepped up its commitment to the Ramsar Convention, particularly since 2021, showcasing recognition of these assets as national priorities.
As of late 2025, India has successfully designated a remarkable total of 94 Wetlands of International Importance (Ramsar Sites), covering a substantial and critical area of its geographical landscape.
[Image split showing Chilika Lake (a vast lagoon) and Keoladeo National Park (dense bird sanctuary)]
The Pioneers: Establishing the Foundation
India’s journey under the Convention began in 1981 with the accreditation of two iconic sites:
- Chilika Lake (Odisha): A massive brackish water lagoon, it is the largest wintering ground for migratory waterfowl on the Indian subcontinent and is globally famous for its diverse birdlife and Irrawaddy dolphins.
- Keoladeo National Park (Rajasthan): A former duck-hunting preserve, this man-made wetland ecosystem is a critical bird sanctuary, famous for its massive migratory bird congregations.
The Recent Surge: 2021 to 2025
The surge from 42 sites in 2021 to 94 in late 2025 highlights an unprecedented institutional focus on wetland protection. This rapid expansion, particularly in states like Tamil Nadu and Bihar, reflects a geographically inclusive strategy aimed at securing the nation’s diverse wetland heritage.
The final leap to the 94-site milestone occurred in late October 2025 with the designation of Gogabeel Lake (Bihar). This oxbow wetland, situated between the Ganga and Mahananda rivers, is critical for flood mitigation and serves as a key habitat for migratory birds. Its designation underscores the success of local conservation efforts, as it is managed as Bihar’s first Community Reserve.
The Nine Criteria for Designation
For a wetland to be designated as a Ramsar Site, it must meet at least one of nine specific, stringent criteria demonstrating its International Importance. These criteria are broadly grouped into two categories:
Group A: Unique or Representative Wetland Types
- Criterion 1 (Unique or Rare): The wetland contains a representative, rare, or unique example of a natural or near-natural wetland type found within the appropriate biogeographic region.
Group B: Importance for Conserving Biological Diversity
- Criterion 2 (Vulnerable Species): The wetland supports vulnerable, endangered, or critically endangered species or threatened ecological communities.
- Criterion 5 (Waterbird Abundance): It regularly supports 20,000 or more waterbirds.
- Criterion 6 (Waterbird Percentage): It regularly supports 1% of the individuals in a population of one species or subspecies of waterbird.
- Criterion 7 & 8 (Fish Importance): These criteria focus on sites that support a significant proportion of indigenous fish, are important food sources, or serve as critical spawning grounds, nurseries, and migration paths for fish stocks.
- Criterion 9 (Non-Avian Abundance): It regularly supports 1% of the individuals in a population of one species or subspecies of wetland-dependent non-avian animal species.
Comprehensive List of Indian Ramsar Sites
The following table details the 94 Ramsar Sites, ordered by the number of sites per state or union territory. Tamil Nadu is currently the leading regional contributor with 20 designated sites.
| Rank | Wetland Name | State / UT | Year Designated | Key Attraction / Significance |
| 1 | Chilika Lake | Odisha | 1981 | Largest brackish water lagoon; wintering ground for migratory waterfowl; Irrawaddy dolphins. |
| 2 | Keoladeo National Park | Rajasthan | 1981 | Critical bird sanctuary; formerly hosted the endangered Siberian Crane. |
| 3 | Harike Wetland | Punjab | 1990 | Confluence of Beas and Sutlej rivers; key wintering area for migratory birds. |
| 4 | Loktak Lake | Manipur | 1990 | Largest freshwater lake in Northeast India; famous for floating islands (phumdis). |
| 5 | Sambhar Lake | Rajasthan | 1990 | India’s largest inland salt lake; major habitat for flamingos and other migratory birds. |
| 6 | Wular Lake | Jammu & Kashmir | 1990 | Largest freshwater lake in India; supports large fish population (trout, common carp). |
| 7 | Ashtamudi Wetland | Kerala | 2002 | Second largest estuarine ecosystem in Kerala; home to unique Kallar (mudflats). |
| 8 | Bhoj Wetlands | Madhya Pradesh | 2002 | Two lakes (Upper and Lower Lake) crucial for Bhopal’s water supply and bird diversity. |
| 9 | Bhitarkanika Mangroves | Odisha | 2002 | Second largest mangrove ecosystem in India; protects Saltwater crocodile. |
| 10 | Deepor Beel | Assam | 2002 | Important bird area (IBA); one of the largest freshwater lakes in the Brahmaputra valley. |
| 11 | East Kolkata Wetlands | West Bengal | 2002 | World’s largest natural sewage treatment plant; supports aquaculture and farming. |
| 12 | Kanjli Wetland | Punjab | 2002 | Man-made wetland on the perennial Kali Bein river. |
| 13 | Kolleru Lake | Andhra Pradesh | 2002 | Largest natural freshwater lake in India (between Godavari and Krishna deltas). |
| 14 | Point Calimere WLS and Bird Sanctuary | Tamil Nadu | 2002 | Rich diversity of waterbirds and habitat for Blackbuck. |
| 15 | Pong Dam Lake | Himachal Pradesh | 2002 | Reservoir on the Beas River; hosts over 220 bird species. |
| 16 | Ropar Wetland | Punjab | 2002 | Reservoir on the Sutlej River; important breeding area for migratory species. |
| 17 | Sasthamkotta Lake | Kerala | 2002 | Largest freshwater lake in Kerala; provides drinking water to Kollam city. |
| 18 | Tsomoriri Lake | Ladakh | 2002 | High altitude (4,595m) lake; breeding ground for vulnerable Black-necked Crane. |
| 19 | Vembanad-Kol Wetland | Kerala | 2002 | Longest lake in India; supports the traditional Kuttanad paddy cultivation (below sea level). |
| 20 | Chandertal Wetland | Himachal Pradesh | 2005 | High altitude (4,300m) crescent-shaped lake in the Spiti region. |
| 21 | Hokera Wetland | Jammu & Kashmir | 2005 | Natural perennial wetland near Srinagar; habitat for migratory species from Siberia. |
| 22 | Renuka Wetland | Himachal Pradesh | 2005 | Largest natural lake in Himachal Pradesh; named after the mother of Parashuram. |
| 23 | Rudrasagar Lake | Tripura | 2005 | Lake with the famous floating palace Neermahal. |
| 24 | Surinsar-Mansar Lakes | Jammu & Kashmir | 2005 | Hindu holy site; unique forest ecosystem on the Siwalik hills. |
| 25 | Upper Ganga River (Brijghat to Narora) | Uttar Pradesh | 2005 | Stretch of Ganga River; habitat for endangered Gangetic Dolphin and Gharial. |
| 26 | Nalsarovar Bird Sanctuary | Gujarat | 2012 | Largest water bird sanctuary in Gujarat; habitat for pelicans, flamingos. |
| 27 | Nandur Madhameshwar | Maharashtra | 2019 | Maharashtra’s first Ramsar site; known as the “Bharatpur of Maharashtra.” |
| 28 | Beas Conservation Reserve | Punjab | 2019 | Habitat for the endangered Indus River Dolphin; unique freshwater ecosystem. |
| 29 | Keshopur-Miani Community Reserve | Punjab | 2019 | Man-made wetland managed by local communities. |
| 30 | Nangal Wildlife Sanctuary | Punjab | 2019 | Located on the Sutlej River; supports highly endangered Egyptian Vulture. |
| 31 | Nawabganj Bird Sanctuary | Uttar Pradesh | 2019 | Critical habitat for Sarus Crane and other migratory birds. |
| 32 | Parvati Arga Bird Sanctuary | Uttar Pradesh | 2019 | Twin perennial lakes; hosts vulnerable Greater Spotted Eagle. |
| 33 | Saman Bird Sanctuary | Uttar Pradesh | 2019 | Seasonal oxbow lake; important staging site for thousands of migratory birds. |
| 34 | Samaspur Bird Sanctuary | Uttar Pradesh | 2019 | Perennial lowland marsh; supports threatened species like the Indian Skimmer. |
| 35 | Sandi Bird Sanctuary | Uttar Pradesh | 2019 | Perennial lake supporting high density of waterbirds; known for its historical fort. |
| 36 | Sarsai Nawar Jheel | Uttar Pradesh | 2019 | Large perennial wetland; known for large concentrations of Sarus Crane. |
| 37 | Sunderban Wetland | West Bengal | 2019 | World’s largest mangrove forest; home to the Royal Bengal Tiger. |
| 38 | Asan Barrage | Uttarakhand | 2020 | Man-made reservoir at the confluence of the Yamuna and Asan rivers. |
| 39 | Kanwar (Kabar) Taal Wetland | Bihar | 2020 | Asia’s largest freshwater oxbow lake; faces severe ecological degradation (in Montreux Record). |
| 40 | Lonar Lake | Maharashtra | 2020 | Impact crater lake; known for its unique saline and alkaline water chemistry. |
| 41 | Sur Sarovar (Keetham Lake) | Uttar Pradesh | 2020 | Man-made reservoir near Agra; important refuge for resident and migratory birds. |
| 42 | Tso Kar Wetland Complex | Ladakh | 2020 | High altitude complex (4,500m); includes hypersaline Tso Kar and freshwater Startsapuk Tso. |
| 43 | Bakhira Wildlife Sanctuary | Uttar Pradesh | 2021 | Largest natural floodplain wetland in eastern Uttar Pradesh. |
| 44 | Bhindawas Wildlife Sanctuary | Haryana | 2021 | Artificial freshwater wetland; supports over 250 bird species. |
| 45 | Haiderpur Wetland | Uttar Pradesh | 2021 | Man-made flood protection structure on the Ganga river; habitat for Gangetic Dolphin. |
| 46 | Khijadia Wildlife Sanctuary | Gujarat | 2021 | Unique coastal wetland with both freshwater and saltwater ecosystems. |
| 47 | Pala Wetland | Mizoram | 2021 | Largest natural wetland in Mizoram; key habitat for the endemic Burmese Python. |
| 48 | Satkosia Gorge | Odisha | 2021 | Riverine ecosystem in the Mahanadi River; protects Gharial and Mugger crocodile. |
| 49 | Sultanpur National Park | Haryana | 2021 | Famous bird sanctuary; critical habitat for local and migratory waterbirds. |
| 50 | Wadhvana Wetland | Gujarat | 2021 | Important stopover site for migratory waterfowl on the Central Asian Flyway. |
| 51 | Chitrangudi Bird Sanctuary | Tamil Nadu | 2021 | Traditional irrigation tank; supports pelicans and large waterbird colonies. |
| 52 | Koonthankulam Bird Sanctuary | Tamil Nadu | 2021 | Largest breeding colony of waterbirds in South India. |
| 53 | Thol Lake Wildlife Sanctuary | Gujarat | 2021 | Man-made freshwater reservoir; important site for flamingos and Sarus Cranes. |
| 54 | Ansupa Lake | Odisha | 2022 | Largest freshwater lake in Odisha; famous for its boat-shaped structure. |
| 55 | Gulf of Mannar Marine Biosphere Reserve | Tamil Nadu | 2022 | First Marine Biosphere Reserve in India; shelters Dugong (Sea Cow). |
| 56 | Hirakud Reservoir | Odisha | 2022 | Largest earthen dam and reservoir in the world; vast waterbird habitat. |
| 57 | Hygam Wetland Conservation Reserve | Jammu & Kashmir | 2022 | Flood absorption basin; important site for threatened migratory birds. |
| 58 | Kanjirankulam Bird Sanctuary | Tamil Nadu | 2022 | Used as a nesting site by migratory species from Sri Lanka and Australia. |
| 59 | Karikili Bird Sanctuary | Tamil Nadu | 2022 | Traditional rain-fed irrigation tank; vital for breeding herons and egrets. |
| 60 | Nanda Lake | Goa | 2022 | Goa’s first Ramsar Site; vital for freshwater supply and biodiversity. |
| 61 | Pallikaranai Marsh Reserve Forest | Tamil Nadu | 2022 | Only natural wetland ecosystem remaining in Chennai city. |
| 62 | Pichavaram Mangrove | Tamil Nadu | 2022 | One of the largest and healthiest mangrove forests in the world. |
| 63 | Ranganathittu Bird Sanctuary | Karnataka | 2022 | Islands in the Kaveri River; Karnataka’s first Ramsar site; crocodile habitat. |
| 64 | Sakhya Sagar | Madhya Pradesh | 2022 | Part of the Shivpuri National Park; large water storage facility. |
| 65 | Shallbugh Wetland Conservation Reserve | Jammu & Kashmir | 2022 | Critical for flood control and a haven for migratory shorebirds. |
| 66 | Sirpur Wetland | Madhya Pradesh | 2022 | Shallow, alkaline, nutrient-rich lake in the Malwa region. |
| 67 | Suchindram Theroor Wetland Complex | Tamil Nadu | 2022 | Man-made reservoir and complex irrigation system; supports native fish. |
| 68 | Tampara Lake | Odisha | 2022 | Largest freshwater lake in the Ganjam district; significant fish biodiversity. |
| 69 | Thane Creek | Maharashtra | 2022 | Largest creek in Asia; crucial habitat for Flamingos near Mumbai. |
| 70 | Udhayamarthandapuram Bird Sanctuary | Tamil Nadu | 2022 | Oldest irrigation tank; provides flood relief and water supply. |
| 71 | Vaduvur Bird Sanctuary | Tamil Nadu | 2022 | Man-made irrigation tank; supports nesting and breeding migratory waterfowl. |
| 72 | Vedanthangal Bird Sanctuary | Tamil Nadu | 2022 | One of the oldest water bird sanctuaries in India. |
| 73 | Vellode Bird Sanctuary | Tamil Nadu | 2022 | Rain-fed artificial lake; vital for breeding painted storks and egrets. |
| 74 | Vembannur Wetland Complex | Tamil Nadu | 2022 | Human-made water storage and irrigation system near the coast. |
| 75 | Yashwant Sagar | Madhya Pradesh | 2022 | Reservoir used for water supply to Indore; important feeding ground for waterbirds. |
| 76 | Nagi Bird Sanctuary | Bihar | 2023 | Oxbow lake formed by the Mahananda River; known for its rich avifauna. |
| 77 | Nakti Bird Sanctuary | Bihar | 2023 | Artificial reservoir; provides critical stopover and breeding ground for waterfowl. |
| 78 | Ankasamudra Bird Conservation Reserve | Karnataka | 2024 | Important community-managed bird nesting site in the dry Deccan Plateau region. |
| 79 | Aghanashini Estuary | Karnataka | 2024 | Tidal dominated estuary; vital for local livelihoods (fishing, salt, prawn farming). |
| 80 | Carambolim Lake | Goa | 2024 | Famous artificial lake near Panaji; supports diverse aquatic plants and birds. |
| 81 | Chandubi Lake | Assam | 2024 | Natural lake formed by the 1897 earthquake; ecotourism spot. |
| 82 | Jaipur Lake | Maharashtra | 2024 | Key freshwater source in the Vidarbha region; supports local communities. |
| 83 | Kole Wetlands | Kerala | 2024 | Extensive backwater system; recognized for its unique biological and socio-economic value. |
| 84 | Kondakarla Ava | Andhra Pradesh | 2024 | Shallow freshwater lake near the coast; supports rare floating vegetation. |
| 85 | Kuttanad Backwaters | Kerala | 2024 | Vast network of low-lying fields; known as the “Rice Bowl of Kerala.” |
| 86 | Magadi Kere Conservation Reserve | Karnataka | 2024 | Small, heavily used tank; essential for migratory birds like the Bar-headed Goose. |
| 87 | Munda Lake | Maharashtra | 2024 | Important perennial reservoir; critical for regional water storage. |
| 88 | Son Beel | Assam | 2024 | Largest wetland in Southern Assam; critical fish breeding and resource base. |
| 89 | Gokul Jalashay | Bihar | 2025 | Man-made reservoir providing irrigation and supporting various bird species. |
| 90 | Udaipur Jheel | Bihar | 2025 | Oxbow lake on the Burhi Gandak River; vital for local fishing and irrigation. |
| 91 | Karaivetti Bird Sanctuary | Tamil Nadu | 2025 | Rain-fed reservoir; supports massive congregations of waterbirds during winter. |
| 92 | Longwood Shola Reserve Forest | Tamil Nadu | 2025 | High-altitude shola (patches of stunted tropical montane forest) ecosystem. |
| 93 | Kazhuveli Bird Sanctuary | Tamil Nadu | 2025 | Coastal wetland complex; one of the largest in Southern India. |
| 94 | Gogabeel Lake (New) | Bihar | 2025 | Oxbow wetland near the Ganga-Mahananda confluence; Bihar’s first Community Reserve Ramsar Site. |
Challenges and the Future of “Wise Use”
While the rise to 94 sites is a significant conservation victory for India, the designation itself is a commitment, not a guarantee of protection. Ramsar Sites, like all wetlands, face relentless threats:
- Encroachment and Urbanization: Wetlands near major cities (e.g., Pallikaranai Marsh in Chennai, Thane Creek near Mumbai, East Kolkata Wetlands) are constantly under pressure from real estate development and illegal dumping.
- Pollution: Industrial effluent, untreated sewage, and agricultural runoff contaminate water bodies, causing eutrophication and irreversible ecological damage.
- Climate Change: Changes in rainfall patterns, increased frequency of extreme weather events, and sea-level rise directly threaten both coastal and inland wetlands alike.
The principle of “wise use” is the operational solution in the Indian context. It necessitates integrating wetland conservation into sectoral policies for water management, agriculture, and urban planning. This requires:
- Local Community Participation: Empowering local stakeholders, whose livelihoods depend on the health of the wetland, to be active participants in management and protection.
- Policy Integration: Ensuring that industrial and urban development policies do not negatively impact the hydrological regime of nearby wetlands.
- Restoration and Rehabilitation: Actively restoring degraded wetlands to their functional capacity, using ecological engineering and community knowledge.
Conclusion: Securing the Guardians of Water
The Ramsar Convention remains a powerful instrument for global environmental governance, and India’s decisive action to secure 94 sites demonstrates a renewed and robust commitment to its ecological heritage. The designation of each site is not a final achievement but a commitment to a long-term conservation mandate.
These wetlands, whether they are floodplains supporting farmers, mangroves protecting coastlines, or bird sanctuaries enriching biodiversity, are literally the guardians of our planet’s water and climate stability. As global challenges intensify, the success of the Ramsar Convention and the future of India’s wetlands will depend entirely on translating designation into effective, ground-level action, guided by the enduring principle of “wise use.” It is a collective responsibility to support their conservation and ensure their functional health for generations to come.
