Proclaim a sanctuary in 1940 at the desire of the famous ornithologist Dr. Salim Ali, the Ranganthittu Bird Sanctuary is a heaven for bird watchers and ethereal lovers. The sanctuary is spread over an area of 0.67 square km and is located on the banks of River Cauvery.
This bird’s heaven is the preferred nesting ground for several species of resident birds. Boating on the river, get a wonderful view of the verities species of birds and catch a sight of the marsh crocodiles in the waters.
The river Cauvery is the main source of water. The K.R.S. dam was constructed across river Cauvery on the upstream side, about 8 Kms from Ranganathittu has generated a huge tank. Water is frequently let out of the dam and, the water level around Ranganathittu does not go below a minimum level.
When there is heavy rain in the hydrographic area of river Cauvery & when the water level in the dam goes above the maximum level, water is let out of the dam creating floods in the side of the downstream.