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Chilika Lake — Asia's largest coastal lagoon and India's largest lake (1,100 sq km) — lies along the Odisha coast, separated from the Bay of Bengal by a thin sand spit. A Ramsar Wetland site since 1981 and one of the world's most productive wetlands, Chilika hosts over one million migratory birds annually and India's largest population of Irrawaddy dolphins.
The Migratory Birds of Chilika
Chilika's primary draw is its extraordinary bird life — over 160 species of migratory birds arrive from Central Asia, China, Mongolia, and Siberia between November and February. Flamingos (in flocks of 2,000+) gather at Nalabana Island (the most protected zone). Bar-headed geese (the birds that fly over Everest), Northern Pintails, Eurasian Wigeon, Lesser Flamingos, Ruff, and dozens of wader species use the lake as a critical wintering ground on the Central Asian Flyway. Nalabana Island Bird Sanctuary within the lake provides the most concentrated viewing.
- Bar-headed goose — migrates over the Himalayas from Tibet
- Flamingos — flocks of 2,000+, Nalabana Island
- 1 million+ migratory birds annually, November-February
- 160+ migratory species recorded
The Irrawaddy Dolphins of Chilika
Chilika hosts India's largest Irrawaddy dolphin population — approximately 155 individuals. Irrawaddy dolphins (Orcaella brevirostris) are unusually rounded-headed dolphins that inhabit estuaries and coastal lagoons across Southeast and South Asia. Unlike most dolphins, they are reported to co-operate with traditional net fishers — driving fish toward nets in exchange for feeding opportunities in the disturbed water. This cooperative fishing relationship between Irrawaddy dolphins and Chilika fishers is one of the world's most remarkable human-animal partnerships. Best dolphin viewing: boat from Satapada (the southern tip of the lake).
Boat Safari Options
The lake is only accessible by boat — launches and country boats operate from multiple entry points. Satapada (for dolphin viewing and Nalabana access), Rambha (for flamingo and migratory duck viewing), and Barkul (general lake exploration) are the main access points. Official Forest Department boats are recommended for wildlife-sensitive viewing; local fishing boats provide more intimate access. A full Chilika circuit (Barkul to Satapada via Nalabana) takes a full day.
Conservation and Restoration
Chilika faced severe degradation in the 1980s-1990s: unregulated prawn aquaculture inside the lake eliminated fish habitat; siltation from river input was reducing depth; invasive weed (water hyacinth) was covering large areas; and dolphin populations were declining. The Chilika Development Authority (CDA), established 1992, has reversed much of this: a new sea mouth opened in 2000 dramatically improved salinity and flushing; prawn farms removed; invasive weeds managed. Fish catches have recovered, dolphin populations have increased, and bird numbers are rising.
Conclusion
Chilika is one of Asia's most important wetlands — its role as a migratory bird wintering ground, dolphin habitat, and productive fishery for 200,000+ fisher families makes its conservation a priority of global significance. Visiting through responsible eco-tourism operators directly supports that conservation.