Explanation:

Chilka

Chilika Lake is a brackish water lagoon, spread over the Puri, Khurda and Ganjam districts of Odisha state on the east coast of India, at the mouth of the Daya River, flowing into the Bay of Bengal. It is Asia’s largest salt-water lagoon and is separated from the Bay of Bengal by a sandy ridge. It is the largest wintering ground for migratory birds on the Indian sub-continent. These birds travel great distances; migratory birds probably follow much longer routes than the straight lines, possibly up to 12,000 km, to reach Chilika Lake. Chilka Lake is designated as a wetland of international importance under the Ramsar Convention. The Ramsar Convention on Wetlands of International Importance especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands.