Chilika Lake, Asia's largest brackish water lagoon, is a high biodiversity area, home to several endangered species.

The lagoon accommodates approximately 155-165 dolphins and 1.05 million water birds, encompassing 105 distinct species.

The 2022 Flora and Fauna Survey reported the first sighting of near-threatened ferruginous ducks and a group of Eurasian otters in the lagoon.

In addition to this, the report mentioned that dolphins have begun to inhabit areas of the lagoon that were previously uninhabited.

Irrawaddy dolphins in India are protected by the Wildlife (Protection) Act 1972, ClTES (Appendix-l), and the IUCN Red List.

According to the results of the water bird census, there were a total of 1,036,220 birds, represented by 103 distinct species.

The mudflats of Nalabana and other areas in Chilika are now visible due to a substantial decrease in water level, serving as habitats for over 120,000 waders or shorebirds.

Predatory carnivores were also observed in close proximity to the avian habitat on the southern sector of Chilika lake.