Chilka Lake - Asia's largest brackish water lagoon with water spread ranging from 1165 sq km m the rainy season to 906 sq km in the dry season is nestled in the heart of the coastal Odisha (Orissa). It extends from Bhusandpur in Puri district in the North to Rambha-Malud in Ganjan district in the South, separated from the Bay of Bengal by a 60 km long narrow strip of marshy islands and sand-flats.

Some of the prominent islands like Nalabana, Kalijal, Somolo, Honeymoon, Break-fast, Birds and Rajahansa inhabited by small subsistence fishermen families, are popular destinations for daily boat trips. Because of its rich bio-diversity and socio-economic importance, Chilika was designated as a Ramsar site in 1981 to afford better protection.

Chilika is recognized as one of the most important wetlands in the world because it is home to a phenomenal variety of birds. Chilika Lake offers visitors a spectacular display of its colorful avian charms in a thousand different hues presented by over 160 species in the peak season between November and February. The lake and its reed islands teem with nesting birds-white bellied sea eagles, ospreys, golden plovers, sand pipers, flamingos, pelicans, shovellers, gulls, include migratory ones flying great distances from Iran, Central Asia and Siberia.

The large Nalabana Island (Forest of Reeds) covering about 16 sq km in the lagoon area was declared a bird sanctuary in 1987. The core area of about 9 sq km attracts around 400,000 waterfowls of different species. Often underwater, the island gradually emerges with the outset of summer. It is literally a paradise for bird-watchers.

Another major attraction at Chilika is Irrawady dolphins which are often spotted off Satpada Island. Satpada, bounded by the lagoon on three sides, offers an excellent view and attracts the visitors to its entire 30 km stretch of sand bar. Boats arranged by OTDC are available for both the islands. The lake also supports the local fisherman in earning their living from Chilika's prawn, mackerel and crabs.

Of late, slightly reduced number of birds owing to growth in prawn farming as well as silting and reduced salinity has alarmed the conservationists. The plying of mechanized boats, the increasing of different fishing nets and gears has threatened the flagship species of the Chilika lagoon, the Irrawady dolphin.